Pre-Voyage Procedures, Principles of Celestial Navigation, Terrestrial Navigation, Flashcards
A ship steaming on a course of 246˚ T at 17 knots. At 2107 a lighthouse was observed bearing 207 deg T and at 2119 the same lighthouse bears 179˚ T. What is the ship’s distance off at second bearing?
4.6 miles
A ship is steaming a course of 090˚ T at a speed of 14 knots. At 1841H you observed a lighthouse bearing 053 deg.T and at 1904H, the same lighthouse bears 031˚ T. What is the distance to the lighthouse when abeam?
7.4 miles
Aship is steaming a course of 090˚T at a speed of 14 knots. At 1841, you observed a lighthouse bearing 053°T and at 1904, the same lighthouse bears 031˚T. What will be the time when the lighthouse is abeam of your vessel?
1923
You are steaming on course 090˚T at 14 knots when a lighthouse was observed bearing 053˚ T at 1841. The same lighthouse bears 031˚T at 1904. What is the distance off the lighthouse at second bearing?
8.6 miles
A ship is on course 253˚ T at 14 knots. At 2329 a lighthouse was observed bearing 282˚ T At 2345 the same lighthouse bears 300 deg.T Find the ship’s distance off at second bearing?
5.9 miles
You are steering 078˚ T, and a light was seen dead ahead at a distance of 15.6 miles at 2316 you change course to pass the light abeam to port at a distance of 4.5 miles. If you are making 17 knots, what is the time when abeam of the light?
0009H
You are steering 031˚ T, and a light was seen dead ahead at a distance of 12.7 miles at 0017H you change course to pass the light abeam to starboard at a distance of 3.5 miles. If you are making 11 knots, what is the time when abeam of the light?
0124H
You are steering 173˚T and a light was picked up dead ahead at a distance of 13.9 miles at 0054. You change course to pass the light 4.5 miles off abeam to port. If you making 21 knots, what will be the time when abeam of the light?
0131H
You are steering 163˚ T and a light was picked up dead ahead at a distance of 11 miles at 0142. You change course to pass the light 2 miles off abeam to starboard. If you making 13 knots, what will be the time when abeam of the light?
0232H
A vessel was steaming on a course 168˚ T at a speed of 18 knots. At 1426H a buoy was sighted bearing 144˚ T . At 1434 another bearing of the buoy was taken at 116˚ T. What is the distance off the second bearing and the predicted distance when abeam?
2.0 miles,2nd bearing; 1.8 miles abeam
You desire to make good a true course of 067˚T.The variation is 11˚ West, the magnetic compass deviation is 3˚ East and the gyro error is 1˚ West. A northwesterly wind produces a 5 degree leeway. What should be the course to steer per standard compass to make good the true course?
070 psc
You desire to make good a true course of 129˚T. The variation is 7˚ East, magnetic compass deviation is 4˚ East and the gyro error is 2˚ West. An easterly wind produces a 4 degree leeway. What should be the course to steer per magnetic compass in order to make good the true course?
114 psc
The True course between two points is 023˚T The gyro error is 1˚West and you make an allowance of 4 degree leeway for an East wind. What gyro course should be steered in order to make the True course good?
026 pgc
The True course between two points is 041˚T. The gyro has an error of 1˚ West. You make an allowance of 2 degree leeway for an east-southeast wind. What gyro course should be steered to make the True course good?
044 pgc
Your vessel is steering a course of 027˚ psc. The variation for the locality is 19˚ West and the deviation of the compass is 2˚ East. The wind is from the North-northwest, producing a 5 degree Leeway. What True course are you making good?
015 T
A ship was on course 253˚ T at 14 knots. At 2329 a lighthouse was observed bearing 282˚ T At 2345, the lighthouse bears 300˚ T. What is the ship’s distance off the second bearing and distance when abeam?
5.9 mi./ 4.3 mi.
You are steering 019˚T, and a light was picked up dead ahead at a distance of 11.6 miles at 0216H. You change course to pass the light 3 miles off abeam to port. If you are making 14 knots, what is your ETA at the position 3 miles off the light?
0304H
You are steering 231˚ T, and a light is picked up dead ahead at a distance of 12.3 miles at 0338H. You then change course to pass the light 4 miles off abeam to starboard. If you are making 16.5 knots, what is your ETA at the position 4 miles off the light?
0420H
You are steering 287˚T and a light was picked up dead ahead at a distance of 19.4 miles at 0419H. You change course to pass the light 4 miles off abeam to starboard. If you are making 13 knots, what is your ETA at the position 4 miles off the light?
0547H
You are steering 115˚ T, and a light was picked up dead ahead at a distance of 16.7 miles at 0522. You change course to pass the light 3.5 miles off abeam to port. If you are making 12 knots, what is your ETA at the position 3.5 miles off the light?
0644H
Your ship is sailing at 20 knots on course 160˚T. At 1840 hours you observe a lighthouse bearing 205˚ T. At 1908 hours, the light bears 250˚ T. What is your distance off the lighthouse at the second bearing?
9.3 miles
Your ship is sailing on course 250˚ T at 20 knots. At 1418 hours you observe a lighthouse bearing 205˚T At 1446 hours, the same lighthouse bears 160˚ T. At what distance off will your vessel be abeam of the light?
9.3 miles
Your vessel is on course of 343˚T at 14 knots. At 2156H a light bears 320.5˚T and at 2217H the same light bears 298˚T. At what time and at what distance off will your vessel be abeam of the light?
2232H, 3.4 miles
Your vessel is proceeding down a channel and you see a pair of range lights that are in line ahead. The chart indicates that the direction of this pair of lights is 229˚T and the variation is 6˚ West. If the heading of your vessel at the time of the sighting is 232˚ psc, what is the correct deviation?
3 deg. East
While proceeding up a channel on a course of 350˚ pgc you took a bearing on a pair of range lights and got a bearing of 355˚ pgc. The true bearing on the nautical chart is indicated as 357˚T. The variation for the locality is 22˚ West. The ship’s course psc is 015˚. The deviation on the present heading is ______.
1 deg. West
Your vessel is steering a course of 216˚ psc. Variation for the area is 9˚ West and the deviation is 2˚ East. The wind is from East producing a 5˚ leeway. What true course are you making good?
214 deg True
Your vessel is steering a course of 197˚ psc, variation for the area is 7˚ East and the deviation is 4˚ West. The wind is from the West producing a two-degree leeway. What true course are you making good?
198 deg True
You desire to make good a true course of 203˚ T. The variation is 19˚ East, the magnetic compass deviation is 2˚ West and the gyro compass error is 1˚ East. What should be the compass course to steer per standard magnetic compass to make the true course good?
189 psc
You desire to make good a true course of 007˚ True. The variation is 5˚ East, deviation is 3˚ West and the gyro compass error is 2˚ East. A Southwest by west wind produces a 2 degree leeway. What is the course to steer per standard magnetic compass to make the true course good?
003 deg psc
Your vessel is proceeding up a channel and you see a pair of range lights that are in line ahead. The chart indicates that the direction of this pair of lights is 212˚ T and the variation is 7˚ West. If the heading of your vessel at the time of of the sighting 208˚ per standard magnetic compass, what is the correct deviation?
11 deg. East
Your vessel is proceeding up a channel and you see a pair of range lights that are in line ahead. The chart indicates that the direction of this pair of lights is 014˚ T and the variation is 11˚ East. If the heading of your vessel at the time of sighting is 009˚ per standard magnetic compass, what is the correct deviation?
6 deg. West
Your vessel is proceeding up a channel and you see a pair of range lights that are in line ahead. The nautical chart indicates that the direction of this pair of lights is 343˚ T and the variation is 5˚ West. IF the heading of your vessel at the time of sighting is 344˚ per standard magnetic compass, what isthe correct deviation?
4 deg. East
While your vessel is proceeding down a channel you notice a range of lights in line with your vessel’s mast. If your vessel is on course 001˚ per gyro compass and the charted value of the range lights is 359˚ True, find your gyro compass error.
2 deg. West
The true course between two waypoints is 078˚ Your gyrocompass has an error of 2˚ East and you make anallowance of 3 degree leeway for a North wind. You are at present on auto pilot. What gyro course should be set on your gyro pilot in order to make good the true course?
073 pgc
The true course between two waypoints is 312˚T. Your gyrocompass has an error of 3˚ West and you make an allowance of 4 degree leeway for a west by south wind. At present you are on auto-pilot. What gyro course should be set on your gyro pilot to make the true course good?
311 pgc
A true course of 041˚ between two waypoints is plotted on the nautical chart. At that moment the wind is blowing from East-southeast which would require you to make an allowance of 2˚ to compensate the effect of the wind. Your gyro compass has an error of 1˚W. What gyro course should be steered to make the true course good?
044 pgc
The course line plotted on the chart indicates that the true course between the 2 waypoints is 119 deg.T. Your gyro compass has an error of 3 deg. East and you have to make an allowance of 4 deg. leeway for a south-southwest wind. What gyro course should be steered to make the true course good?
120 pgc
While proceeding up a channel on a course of 010˚ per gyro compass you notice a pair of range lights in alignment with the masts of your vessel when viewed forward. A check on the chart shows the range to be 009˚ T and the variation on the compass rose to be 15˚W. If the ship’s course is 026˚ psc, what is the deviation on the present heading?
2 deg. West
Your ship is entering a channel on a magnetic course of 265˚ with two beacons in range. The true range bearing as taken from the chart is 264˚. If the variation in the locality is 1˚ East, what is the deviation of the magnetic compass?
2 deg. West
What is the true bearing of the peak to be plotted as a line of position (LOP) on the chart when the compass bearing of the peak is 336˚ with a variation of 1˚ East and the deviation is 5˚ West?
332 deg.T
The compass bearing of a mountain peak was taken as 336˚. The variation is 15˚ West and the deviation is 9˚ West. The true bearing of the peak as plotted on the chart is:
312 deg T
What is the deviation of the compass on heading 053˚ T when steering 044 per steering compass to a beacon in range dead ahead with variation in the locality of 4 deg. W?
13 deg.East
You have just taken a satellite fix on your ship and from there the Master traced a new course line on the chart which is 130˚ True. The variation for the locality is 10˚ West and the deviation is 6˚ East. Find compass error and then solve for the compass course to steer.
C/E = 4 deg.West Compass Co. = 134 psc
A ship is on course 250˚ psc, deviation is 18˚ East, variation of the locality is 7˚ East. Find the compass error and the true course.
C/E = 25 deg. East True co. = 275 T
A ship is on course 241˚ psc and 251˚ pgc, when you noticed a range in line bearing 192˚ by gyro. The chart indicates that the range is in line on 194˚ T. The variation of the locality is 16˚ East. What is the deviation of the magnetic compass?
4 deg. W
Your vessel is steering a course of 216˚ psc. Variation for the area is 9˚ West and the deviation is 2˚ East. The wind is from East producing a 5˚ leeway . What is the true course made good (TCMG)?
214 deg.T
Find the compass course to steer(CCTS) on a True course of 225˚ T. Leeway due to a Southerly wind is 10 degrees. The Variation on the locality is 5˚ East, deviation of the compass is 4˚ East.
206 deg. Psc
You are enroute to assist vessel B. Vessel B is underway at 5 knots on course 063˚ T and bears 136˚T at 78 miles away from you. What is the course to steer at 13 knots to intercept vessel B?
114 deg. T
You are enroute to assist vessel B. Vessel B is underway at 4.5 knots on course 233˚ T and bears 264˚ T at 68 miles away from you. What is the course to steer at 13 knots to intercept vessel B?
256 deg.T
You are enroute to assist vessel A. Vessel A is underway at 5.5 knots on course 033˚ T and bears 248˚ T at 64 miles from you. What is the course to steer at 13 knots to intercept vessel A?
262 deg.T
You are enroute to assist vessel A. Vessel A is underway at 5.5 knots on course 033˚ T and bears 284˚ T at 43 miles from you. What is the course to steer at 16 knots to intercept vessel A?
303 deg.T
You are enroute to assist vessel A. Vessel A is underway at 4.5 knots on course 233˚ T and bears 346˚ T at 68 miles from you. What is the course to steer at 13 knots to intercept vessel A?
328 deg.T
The position obstained from one point relative to another, without considering the distance between them is called _______.
Direction
Course is the direction of movement of the observer while the direction of an object from the observer is called ______.
Bearing
The direction of an object from the observer is known as bearing while the direction of movement of the observer is called _____.
Course
The bearing relative to the heading of a vessel which is expressed as the angular difference between heading and the direction is called ______.
Relative Bearing
The direction in which a vessel is steered is called the course while the path that is actually followed by the vessel is called the ______.
Course over ground
You are course 027˚T and took a relative bearing of a lighthouse and found to be 220˚. What is the True bearing of the lighthouse?
247 deg.T
You are on course 344˚ T and took a relative bearing of a lighthouse of 270˚. What is the True bearing of the lighthouse?
254 deg.T
You are on course 277˚ T and took a bearing of a lighthouse of 045˚ R. What is the True bearing of the lighthouse?
322 deg.T
What is the relative bearing of an object broad on port quarter?
225 deg
What is the relative bearing of an object that is broad on starboard bow?
045 deg
If you take a bearing of 176˚ to a lighthouse, what other bearing of another conspicuous object would give the best fix?
079 deg
If you take a bearing of 264˚ to a lighthouse, what other bearing of another conspicuous object would give the best fix?
350 deg
If you take a bearing of 356˚ to a lighthouse, what other bearing of another prominent object would give the best fix?
082 deg.
What is the relative bearing of an object which is two points abaft the starboard beam?
112.5 deg.
What is the relative bearing of an object which is two points abaft the port beam?
247.5 deg
What is the relative bearing of an object located dead astern?
180 deg
If you take a bearing of 191˚ and 313˚ to two prominent objects, what bearing of a third object will provide the best fix?
069 deg
If you take a bearing of 142˚ and 259˚ to two prominent objects on shore, what bearing of a third object will provide the best fix?
201 deg
If you take a bearing of 313˚ and 076˚ of two prominent objects, what bearing of a third object will provide the best fix?
014 deg.
You are taking bearings on two known objects on shore. The best fix is ontained when the angle between the lines of position is:
90 deg
If you take a bearing of 086˚ to a lighthouse, what other bearing of another prominent object would give the best fix?
000 deg
If you take a bearing of 176˚ to a lighthouse, what other bearing of another prominent object would give the best fix?
079 deg
If you take a bearing of 264˚ to a lighthouse, what other bearing of another prominent object would give the best fix?
350 deg
If you take a bearing of 356˚ to a lighthouse, what other bearing of another fixed object on shore would give the best fix?
082 deg.
If you take a bearing of 043˚ and 169˚ to two prominent objects ashore, what bearing of a third object will provide the best fix?
102 deg
If you take a bearing of 135˚ to a prominent object, which other bearing of another object will NOT provide the best fix?
315 deg
If you take a bearing of 225˚ to a prominent object on shore, which other bearing of another prominent object will NOT provide the best fix?
045 deg
If you take a bearing of 045˚ to a prominent object on shore, which other bearing of another prominent object will NOT provide the best fix?
225 deg
If you take a bearing of 315˚ to a conspicuous object on land, which other bearing of another object will NOT provide the best fix?
135 deg
If you take a bearing of 249˚ to a fixed known object on shore, which other bearing will NOT give a good fix?
069 deg
If you take a bearing of 086˚ to a lighthouse, which other bearing of another prominent object will NOT give a good fix?
266 deg
If you take a bearing of 176˚ to a lighthouse, which other bearing of another prominent object will NOT give a good fix?
356 deg
If you take a bearing of 191˚ to a prominent object ashore, which bearing of another object will NOT provide a good fix?
011 deg
If you take a bearing of 264˚ to a lighthouse, which other bearing of another prominent object will NOT produce a good fix?
084 deg
If you take a bearing of 142˚ to a lighthouse, which other bearing of another lighthouse will NOT produce a good fix?
322 deg
If you take abearing of 259˚ to a fixed known object on shore, which of the following bearings of other objects will NOT produce a good fix?
079 deg
If you take a bearing of 322˚ to a fixed charted object on shore, which of the following bearing of another object will NOT provide a good fix?
142 deg
If you take a bearing of 145˚ to a fixed charted object on shore, which of the following bearing of another object will NOT provide a good fix?
325 deg
Which of the following bearings of two prominent objects when taken simultaneously will provide a good fix?
144 deg and 236 deg
Which of the following bearings of two fixed objects on shore when taken simultaneously will provide a good fix?
228 deg and 136 deg
Which of the following bearings of two lighthouses when taken simultaneously will provide a good fix?
184 deg and 275 deg
Which of the following bearings of two fixed and charted objects will provide a good fix when taken at nearly the same time?
119 deg and 207 deg
Which of the following bearings of two fixed and charted objects will provide a good fix when taken at nearly the same time?
131 deg and 040 deg
Which of the following bearings of two fixed and charted objects will give a good crossing angle between 2 LOPs if taken at nearly the same time?
136 deg and 228 deg
Which of the following bearings of two fixed and charted objects will give a good crossing angle between 2 LOPs if taken at nearly the same time?
275 deg and 184 deg
Which of the following bearings of two fixed and charted objects will give a good crossing angle between 2 LOPs if taken at nearly the same time?
207 deg and 119 deg
Which of the following bearings of two fixed and charted objects will give a good crossing angle between 2 LOPs if taken at nearly the same time?
040 deg and 131 deg
Which of the following bearings of two fixed and charted objects will give a good crossing angle between 2 LOPs if taken at nearly the same time?
128 deg and 218 deg
Which of the following bearings of two fixed and charted objects will give a good crossing angle between 2 LOPs if taken at nearly the same time?
345 deg and 280 deg
Which of the following bearings of two fixed and charted objects will give a good crossing angle between 2 LOPs if taken at nearly the same time?
209 deg and 285 deg
Which of the following bearings of two fixed and charted objects will give a good crossing angle between 2 LOPs if taken at nearly the same time?
023 deg and 102 deg
Which of the following bearings of two fixed and charted objects will give a good crossing angle between 2 LOPs if taken at nearly the same time?
120 deg and 042 deg
Which of the following bearings of two fixed and charted objects will give a good crossing angle between 2 LOPs if taken at nearly the same time?
005 deg and 056 deg
Which of the following bearings of two fixed and charted objects will give a good crossing angle between 2 LOPs if taken at nearly the same time?
313 deg and 076 deg
Which of the following bearings of two fixed and charted objects will give a good crossing angle between 2 LOPs if taken at nearly the same time?
142 deg and 259 deg
Which of the following bearings of two fixed and charted objects will give a good crossing angle between 2 LOPs if taken at nearly the same time?
169 deg and 048 deg
A vessel is following a range to keep herself within a narrow channel. The chart indicates the range to be 321˚. The vessel is “on range” when she is steering a course of ______.
321 deg.T
A vessel is following a range to keep herself within a narrow channel. The chart indicates the range to be 108˚. The vessel is “on range” when she is steering a course of ______.
108 deg.T
A vessel is following a range to keep herself within a narrow channel. The chart indicates the range to be 243˚. The vessel is “on range” when she is steering a course of ______.
243 deg.T
A vessel is following a range to keep herself within a narrow channel. The chart indicates the range to be 041˚. The vessel is “on range” when she is steering a course of ______.
041 deg.T
A vessel is following a range to keep herself within a narrow channel. The chart indicates the range to be 287˚. The vessel is “on range” when she is steering a course of ______.
287 deg.T
A vessel is following a range to keep herself within a narrow channel. The chart indicates the range to be 001˚. The vessel is “on range” when she is steering a course of ______.
001 deg.T
A vessel is following a range to keep herself within a narrow channel. The chart indicates the range to be 154˚. The vessel is “on range” when she is steering a course of ______.
154 deg.T
A vessel is following a range to keep herself within a narrow channel. The chart indicates the range to be 256˚. The vessel is “on range” when she is steering a course of ______.
256 deg.T
Your vessel is making way through the water at a speed of 12 knots. Your vessel traveled 30 nautical miles in 2 hours 20 minutes. What current are you experiencing?
A following current of 0.9 knot
Your vessel is making way through the water at a speed of 12 knots. Your vessel traveled 30 nautical miles in 2 hours 15 minutes. What current are you experiencing?
A following current of 1.3 knots
Course is the direction of movement of the observer while the direction of a current from the observer is called ______.
set
Your vessel is making way through the water at a speed of 12 knots. Your vessel traveled 30 nautical miles in 2 hours 30 minutes. What current are you experiencing?
slack
Your vessel is making way through the water at a speed of 10 knots. Your vessel traveled 30 nautical miles in 2 hours 30 minutes. What current are you experiencing?
A following current of 2.0 knots
Your vessel is making way through the water at a speed of 14 knots. Your vessel traveled 30 nautical miles in 2 hours 24 minutes. What current are you experiencing?
A head current of 1.5 knots
Your vessel is making way through the water at a speed of 14 knots. Your vessel traveled 55 nautical miles in 3 hours 24 minutes. What current are you experiencing?
A following current of 2.2 knots
Your vessel is making way through the water at a speed of 14 knots. Your vessel traveled 46 nautical miles in 3 hours 24 minutes. What current are you experiencing?
A head current of 0.5 knot
Your vessel is making way through the water at a speed of 16 knots. Your vessel traveled 45 nautical miles in 2 hours 30 minutes. What current are you experiencing?
A following current of 2 knots
Your vessel is making way through the water at a speed of 16 knots. Your vessel traveled 56 nautical miles in 3 hours 30 minutes. What current are you experiencing?
current is slack
At 0000H you fix your position and change course to 090˚T At 0030H, you again fix your position, and it is 0.5 miles east of your DR position. Which statement is true?
The current is easterly
At 0000H you fix your position and change course to 270˚T At 0030H, you again fix your position, and it is 0.5 miles east of your DR position. Which statement is true?
The set is 090, drift 1.0 knot
At 0000H you fix your position and plot a new DR trackline. At 0200H, you again fix your position, and it is 0.5 miles west of your DR position. Which statement is true?
The set is 270, drift 0.25 knot
At 0000H you fix your position and plot a new DR trackline. At 0200H, you again fix your position, and it is 0.5 miles west of your DR position. Which statement is true?
The drift is 0.25 knot
At 0000H you fix your position and change course to 090˚ T At 0030H, you again fix your position, and it is 0.5 miles west of your DR position. Which statement is true?
The current is westerly
At 1200H you fix your position and change course to 000˚ T At 1230H, you again fix your position, and it is 0.5 miles east of your DR position. Which statement is true?
The current is easterly
At 1100H you fix your position and change course to 000˚T At 1130H, you again fix your position, and it is 0.5 miles west of your DR position. Which statement is true?
The current is westerly
At 0000H you fix your position and change course to 180˚T At 0100H, you again fix your position, and it is 1.5 miles north of your DR position. Which statement is true?
The current is northerly
At 1000H you fix your position and change course to 180˚T At 1030H, you again fix your position, and it is 0.5 miles south of your DR position. Which statement is true?
The current is southerly
At 0900H you fix your position and change course to 135˚T At 0930H, you again fix your position, and it is 0.5 miles southwest of your DR position. Which statement is true?
The current set is 225 deg.
At 0000H you fix your position and change course to 225˚T At 0130H, you again fix your position, and it is 0.5 miles northwest of your DR position. Which statement is true?
The current set is 315 deg.
At 0800H you fix your position and change course to 045˚T At 0830H, you again fix your position, and it is 0.5 mile southeast of your DR position. Which statement is true?
The current set is 135 deg.
At 0105H you fix your position and change course to 135˚T At 0135H, you again fix your position, and it is 0.5 mile southeast of your DR position. Which statement is true?
Dirft = 1.0 knot; Current Set = 135 deg.T
At 1200H you fix your position and change course to 315˚T At 1225H, you again fix your position, and it is 0.9 mile southwest of your DR position. Which statement is true?
Drift = 2.1 knots; Current Set = 225 deg.T
At 0300H you fix your position and change course to 225˚ At 0315H, you again fix your position, and it is 0.5 miles northwest of your DR position. Which statement is true?
Drift = 2 knots; Current Set = 315 deg.T
At 0400H you fix your position and change course to 045˚T At 0450H, you again fix your position, and it is 1.0 mile northeast of your DR position. Which statement is true?
Drift = 1.2 knots; Current Set =045 deg. T
A vessel is to proceed at 12 knots on a course of 211˚T through a current estimated to be setting at 255˚T and a drift of 3 knots. Find Course To Steer (CTS) and the speed of advance (SOA).
CTS = 199 deg.T; SOA = 10 knots
You desire to make good a course of 062˚T to a destination 4.7 miles away. Your speed is 3 knots. The Tidal Current Table lists a set of 120˚T and a drift of 1 knot for the time period you will be making the passage. Find your course to steer (CTS) an
CTS = 046 deg.T; SOA = 3.3 3.3 knots
The anchorage is located 20 nautical miles North of a vessel with a speed of 15 knots. A current is known to set 3 knots Easterly. Calculate the course to steer in order to drop her anchor to the charted anchorage on the spot.
349 deg.
You are underway on course 180˚T at 22 knots. The apparent wind is from 70 deg. off the port bow, speed 20 knots. What is the true direction and speed of the true wind?
051 deg.T; 24.1 knots
You are underway on course 270˚T at 10 knots. The apparent wind is from 10 deg. off the port bow, speed 30 knots. What is the true direction and speed of the true wind?
225 deg.T; 20 knots
Your ship is on course 195˚T at 15 knots. The apparent wind is from 40 deg. on the port bow, speed 30 knots. The direction and speed of the true wind are:
027 deg.T; 21 knots
Your ship is proceeding on course 150˚T at a speed of 17 knots. The apparent wind is from 40 deg on your starboard bow, speed 15 knots. Calculate the True wind direction and speed.
270 deg.T; 11 knots
Your vessel’s course is 150˚T at 17 knots. The apparent wind is from 40 deg. off the starboard bow, speed 15 knots. What is the speed of the true wind?
11 knots
When a body has crossed the observer’s meridian, this is called:
any of these
During meridian passage, the LHA and meridian angle of the body is zero. What is its altitude?
maximum altitude
To a certain observer, a meridian transit can be at: I. upper transit only II. Lower transit only
both I and II
A body will be observed at lower transit only :
if the body is circumpolar
At lower transit, the body’s altitude is at its minimum bearing North or South. What will be the LHA?
180 deg.
The azimuth of the celestial body during meridian passage will be: I. North II.South
either I or II
If the observer is at 5˚ South and the sun’s declination is 10˚ North, what will be the bearing of the body during meridian passage?
North
If the observer is at 5˚ South and the sun’s declination is 10˚ North, what will be the bearing of the body during meridian passage?
000 deg.t
If the observer is at 5˚ North and the sun’s declination is 10˚ South, what will be the bearing of the body during meridian passage?
South
If the observer is at 5˚ North and the sun’s declination is 10˚ South, what will be the bearing of the body during meridian passage?
180 deg.T
If the observer is at 5˚ North and the sun’s declination is 10˚ North, what will be the bearing of the body during meridian passage?
North
If the observer is at 10˚ North and the sun’s declination is 5˚ North, what will be the bearing of the body during meridian passage?
South
If the observer is at 10˚ North and the sun’s declination is 5˚ South, what will be the bearing of the body during meridian passage?
180 deg.T
If the observer is at 5˚ North and the sun’s declination is 10˚ North, what will be the bearing of the body during meridian passage?
000 deg.T
If the observer is at 10˚ North and the sun’s declination is 15˚ North, what will be the bearing of the body during meridian passage?
North
If the observer is at 10˚ North, and the sun is at summer solstice, what will be the bearing of the body during meridian passage?
North
If the observer is at 40˚North, and the sun is at summer solstice, what will be the bearing of the body during meridian passage?
South
If the observer is at 10˚ North, and the sun is at summer solstice, what will be the bearing of the body during meridian passage?
000 deg.T
If the observer is at 40˚ North, and the sun is at summer solstice, what will be the bearing of the body during meridian passage?
180 deg.T
If the observer is at 10˚ South, and the sun is at summer solstice, what will be the bearing of the body during meridian passage?
North
If the observer is at 10˚ South, and the sun is at summer solstice, what will be the bearing of the body during meridian passage?
000 deg.T
If the observer is at 10˚ South, and the sun is at winter solstice, what will be the bearing of the body during meridian passage?
South
If the observer is at 10˚ South, and the sun is at winter solstice, what will be the bearing of the body during meridian passage?
180 deg.T
If the observer is at 40˚ South, and the sun is at winter solstice, what will be the bearing of the body during meridian passage?
North
If the observer is at 40˚ South, and the sun is at winter solstice, what will be the bearing of the body during meridian passage?
000 deg.T
Find the latitude of the observer if the sun’s altitude at upper transit is 75˚ bearing North and the declination is 10 deg North.
5 deg. S
Find the latitude of the observer if the sun’s altitude at upper transit is 50˚ bearing South and the declination is 5˚ South.
35 deg. N
Find the latitude of the observer if the sun’s altitude at upper transit is 50˚ bearing South and the declination is 10˚ South.
30 deg. N
Find the latitude of the observer if the sun’s altitude at lower transit is 10˚ bearing South and the declination is 70˚ South.
30 deg. S
At meridian passage, upper transit, Ho of the sun is 39˚19.3’, bearing North. Declination of the sun is 23˚38.2’ South. Find latitude at transit.
74˚18.9’ S
At meridian passage, upper transit, Ho of the sun is 48˚11.6’, bearing South. Declination of the sun is 1˚46.3’ North. Find latitude at transit.
43˚34.7’ N
At meridian passage, upper transit, Ho of the sun is 76˚46.5’, bearing North. Declination of the sun is 20˚10.5’ North. Find latitude at transit.
9˚57.0’ N
The Observed altitude (Ho) of Star Kochab at meridian passage, lower transit is 16˚11.5’. The star’s declination is 74˚16.2’ North. Find latitude.
31˚55.3’ N
The Observed altitude (Ho) of Star Deneb at meridian passage, lower transit is 15˚23.5’. The star’s declination is 45˚16.6’ North. Find latitude.
60˚06.9’ N
On April 22, in longitude 098˚East, the observed altitude (Ho) of the Sun’s U.L. at meridian passage was 54˚42.2’ bearing North, declination is 11˚42.1’ N. Calculate the observer’s latitude.
23˚35.7’ S
On Jan. 16, in longitude 132˚54’W, the observed altitude (Ho) of the Sun’s L.L. at meridian passage was 64˚04.2’ bearing North, declination is 21˚58.5’S. Calculate the observer’s latitude.
47˚54.3’ S
The observed meridian altitude (Ho) fo the star Sirius (lower transit) was 14˚03.9’ bearing South. Find the observer’s latitude if the declination is 16˚43’ S
87˚20.9’ S
At meridian passage, upper transit, the observer’s latitude was found to be 43˚34.7’ North, Declination is 1˚46.3’ North. Find the Observed Altitude (Ho)
48˚11.6’ S
At meridian passage, upper transit, the observer’s latitude was found to be 9˚57’ North, Declination is 20˚10.5’ North. Find the Observed Altitude (Ho)
79˚4.5’ N
The Meridian Altitudes of a celestial body are 12˚ and 68˚, North and South respectively from the navigator. Calculate the latitude.
62˚ N
The Meridian Altitudes of a celestial body are 12˚ and 68˚, North and South respectively from the navigator. Calculate declination of the celestial body.
40˚ N
The Meridian Altitudes of a celestial body are 12˚ and 68˚, North and South respectively from the navigator. Calculate the true altitude of the celestial body when it crosses the prime vertical.
46˚43’ N
What is the latitude of a place where the sun is exactly at the zenith of the observer at Local Apparent Noon (LAN) of June 21?
23˚27’ N
What is the latitude of a place where the sun is exactly at the zenith of the observer at Local Apparent Noon (LAN) of December 22?
23˚27’ S
What is the latitude of a place where the sun is exactly at the zenith of the observer at Local Apparent Noon (LAN) of March 21?
at the equator
What is the latitude of a place where the sun is exactly at the zenith of the observer at Local Apparent Noon (LAN) of September 22 or 23?
0 deg. Latitude
On June 10 in Longitude 058˚42’E, the sextant meridian altitude (Hs) of the sun’s U.L. was 87˚32.0’ bearing South, I.E. 1.3’ on the arc. DIP correction is 4.8’, Main corr. Is 15.9’. Calculate the latitude of the observer if the sun’s declination from the almanac indicates 23˚17.4’ North.
26˚07.4’ N
The observed meridian altitude (Ho) fo the star Sirius (lower transit) was 14˚03.9’ bearing South. Find the observer’s latitude if the declination is 16˚43’ South.
87˚20.9’ S
On Jan. 20, at GMT 22h 53m 40s, in longitude 041˚26’W, the observed altitude (Ho) of the star Polaris was 35˚54.9’ . The correction values determined by Polaris tables are Ao = 0˚ 53.2’, A1 = 0.4’ A2 = 0.7’. Calculate the observer’s latitude.
35˚49.2’ N
On Sept. 12, at GMT 10h35m 00s LZT in longitude 057˚ 58’ W, the Ho of star Polaris was 35˚50’. The correction values from the Polaris Tables: Ao = 1˚22.1’, A1 = 0.4’, A2 =0.9’ Find the latitude of the observer.
36˚13.4’ N
Find the latitude of the observer if the true altitude of Polaris is 34˚17.6’. The correction values from the Polaris Tables: Ao = 0˚58.5’, A1 = 0.6’, A2 = 0.9’
34˚17.6’ N
The mean radius of the Earth is 3440 nautical miles, find the radius of the parallel of Latitude of Manila (Lat. 14˚30’ N approximately)
3330.4 nm
The Earth is not a true sphere so that the equatorial radius is larger than the polar radius. The difference is _____.
13.5 miles
Given equatorial radius of the Earth as 3444 nm, find radius of a parallel of latitude at 70˚N or S
1177.9 nm
With an equatorial radius of the Earth of 3444nm find circumference of a parallel of latitude 30˚N
18740.2 nm
At what rate per hour is the Royal observatory at Greenwich (Latitude 51˚28.5’ N) being carried around the Earth’s axis?
560.6 knots
At what rate per hour is the Latitude 23˚20’ N being carried around the Earth’s axis?
826.4 knots
At what rate per hour is latitude 60˚00’ S being carried around the Earth’s axis?
450 nm/hr
At what rate per hour is latitude 45 deg. North being carried around the Earth’s axis?
636.4 nm/hr
At what rate per hour is latitude 36˚38’ South being carried around the Earth’s axis?
722.22 nm/hr
With a given mean radius of the Earth as 3440 nm, calculate the radius of a parallel of latitude at 46˚24’ North.
2372.3 nm
Assuming the equatorial radius of the Earth as 3444 nm, find te circumference of the equator?
21639.3 nm
The distance between two meridians is 427 nautical miles in Latitude 50˚20’ N. What is the angle at the pole?
11˚08.9’
The distance between two meridians is 600 nautical miles in Latitude 45˚20’ N. What is the angle at the pole?
22˚16.9’
The distance between two meridians is 248 nautical miles in Latitude 63˚20’ N. What is the angle at the pole?
9˚12.6’
The distance between two meridians is 127 nautical miles in Latitude 39˚30’ N. What is the angle at the pole?
2˚44.5’
The distance between two meridians is 724 nautical miles in Latitude 20˚50’ N. What is the angle at the pole?
12˚54.6’
The distance between two meridians is 600 nautical miles in Latitude 45˚20’ N. Find the Difference of Longitude (Dlo) between the 2 meridians.
22˚16.9’
In what latitude will a departure of 300 nm corresponds to a Dlo of 6˚40’?
41˚24.6’ N or S
In what latitude will a departure of 250 nm corresponds to a Dlo of 6˚40’?
51˚19.1’ Nor S
In what latitude will a departure of 200 nm corresponds to a Dlo of 4˚16’ ?
38˚37.5’ N or S
On a certain parallel, the distance between two meridians is 250 nm while the Dlo between the meridians is 12˚30’. What is the latitude?
70˚31.9’ N or S
On a certain parallel, the distance between two meridians is 340 nm while the Dlo between the meridians is 18˚30’. What is the latitude?
72˚09.8’ N or S
In Latitude 50˚10’ N, the departure between two meridians is 360 nautical miles. What is the Difference of Longitude?
9˚22’
In Latitude 45˚20’ N, the departure between two meridians is 430 nautical miles. What is the Difference of Longitude?
10˚11.7’
In Latitude 20˚40’ N, the departure between two meridians is 130 nautical miles. What is the Difference of Longitude?
2˚19’
In Latitude 38˚20’ N, the departure between two meridians is 530 nautical miles. What is the Difference of Longitude?
11˚15.6’
A ship steams on a course of 090˚T from port A in latitude 23˚30’ N; Long. 059˚10’E to Port B in Latitude 23˚30’ N; Longitude 065˚30’E. How far did she steam?
348.5 nm
A ship steams on a course of 270˚T from port A in latitude 23˚30’ N; Long. 059˚10’E to Port B in Latitude 23˚30’ N; Longitude 065˚30’E. How far did she steam?
348.5 nm
In Latitude 50˚20’N, a vesse steams from Long. 015˚46’W to Long. 031˚18’W. What distance was made good?
594.9 nm
On a certain parallel, the distance betweeen two meridians is 150 nm. On the equator the distance between the same two meridians is 235 nautical miles. What is the latitude of the parallel?
50˚20.1’ N or S
On a certain parallel, the distance betweeen two meridians is 400 nm. On the equator the distance between the same two meridians is 470 nautical miles. What is the latitude of the parallel?
31˚40.3. N or S
On a certain parallel, the distance betweeen two meridians is 250 nm. On the equator the distance between the same two meridians is 330 nautical miles. What is the latitude of the parallel?
40˚44.9’ N or S
On a certain parallel, the distance betweeen two meridians is 25 nm. On the equator the distance between the same two meridians is 30 nautical miles. What is the latitude of the parallel?
33˚33’ N or S
On a certain parallel, the distance betweeen two meridians is 50 nm. On the equator the distance between the same two meridians is 150 nautical miles. What is the latitude of the parallel?
70˚31.7’ N or S
On a certain parallel, the distance betweeen two meridians is 130 nm. On the equator the distance between the same two meridians is 330 nautical miles. What is the latitude of the parallel?
66˚48’ N or S
On a certain parallel, the distance betweeen two meridians is 15 nm. On the equator the distance between the same two meridians is 30 nautical miles. What is the latitude of the parallel?
60˚00’ N or S
On a certain parallel, the distance betweeen two meridians is 40.8 nm. On the equator the distance between the same two meridians is 81.6 nautical miles. What is the latitude of the parallel?
60˚00’ N or S
On a certain parallel, the distance betweeen two meridians is 20 nm. On the equator the distance between the same two meridians is 80 nautical miles. What is the latitude of the parallel?
75˚31.3’ N or S
On a certain parallel, the distance betweeen two meridians is 120 nm. On the equator the distance between the same two meridians is 280 nautical miles. What is the latitude of the parallel?
64˚37.4’
On a certain parallel, the distance betweeen two meridians is 2350 nm. On the equator the distance between the same two meridians is 4860 nautical miles. What is the latitude of the parallel?
61˚05’ N or S
On a certain parallel, the distance betweeen two meridians is 2123 nm. On the equator the distance between the same two meridians is 8130 nautical miles. What is the latitude of the parallel?
74˚51.8’ N or S
On a certain parallel, the distance betweeen two meridians is 235 nm. On the equator the distance between the same two meridians is 350 nautical miles. What is the latitude of the parallel?
47˚49.3’ N or s
On a certain parallel, the distance betweeen two meridians is 320 nm. On the equator the distance between the same two meridians is 680 nautical miles. What is the latitude of the parallel?
61˚55.6’ N or S
On a certain parallel, the distance betweeen two meridians is 240 nm. On the equator the distance between the same two meridians is 670 nautical miles. What is the latitude of the parallel?
69˚00’ N or S
A vessel steers a course of 146˚T from Lat. 35˚10’N to Lat. 8˚46’ N. How far did she steam?
1910.7 nm
A vessel sails from Lat.21˚45’N; Long.023˚56’ W on course 146˚ T for a distance of 300 nm. Find the Latitude and Longitude of Arrival by mercator Sailing.
Lat.17˚36.3’ N; Long. 026˚53.1’W
Find the DLAT and Depature made good if a vessel steams for 1936 nautical miles on course 248˚ T
Dlat 725.2’ S; Dep. 1795.1’
Find the DLAT and Depature made good if a vessel steams for 435 nautical miles on course 026˚ T
Dlat 391.0’ N; Dep. 190.7’
Find the DLAT and Depature made good if a vessel steams for 341 nautical miles on course 215˚ T
Dlat 279.3’ S; Dep 195.6’
A vessel makes a Dlat of 289.4’ N and a departure of 203.2 nautical miles. Find the course and distance.
Course 324˚55.5’; Dist. 353.6’
In latitude 50˚20’ N, a vessel steams 270˚T from Long. 015˚ 46’ W to Long. 031˚18’ W. Find the distance made good.
594.9 nm
A vessel steams 470 nautical miles along the parallel of “x” North from Long.015˚35’ W to Long. 027˚20’ W. What is the latitude of “x” ?
Lat. 48˚ 11.3’ North
From Latitude 39˚00’N; 033˚10’W, a ship steams on course 270˚T at 10 knots for 3 days and 8 hours. Find arrival position.
Lat. 39˚00’ N; Long. 050˚ 19.4’ W
Two ports A and B are in the Northern Hemisphere. On the parallel of Port A, the distance between their meridians is 250 nm. On the parallel of Port B it is 350 nm and on the equator it is 400 nm. What are the Latitudes of the ports?
Lat 51˚19.1’ N for Port A Lat 28˚57.3’ N for Port B
A ship steams 090˚T for 200 nautical miles in Lat. 49˚10’ N. By how much will her clocks have to be advanced?
20m 23s
Your vessel receivesa distress call from a vessel reporting her position as LAT 35˚01’ S; LONG. 018˚51’ W. Your position is LAT 35˚01’ S; LONG.021˚42’ W. Determine what will be your True Course and distance to the vessel in distress by parallel sailing method.
090˚T, 140 nm
A vessel in Latitude 55˚12’ N sails on course 270˚T and made a Dlo of 21˚36.6’. If the time taken was 3 days 2 hours, find the vessel’s speed.
10 knots
On a certain parallel, a vessel must steam one nautical mile to alter her longitude by 2 minutes. What is the latitude of the parallel?
Lat. 60˚ N or S
A ship “A” is on the equator steering 090˚T at 16 knots; while a ship “B” is on a parallel of North latitude, steering 270˚T at 12 knots. When “A” makes a Dlo of 1’, “B” makes a Dlo of 48’. Calculate the latitude of “B”.
Lat 20˚ 22’
A ship in Latitude 59˚40’ sailed on a certain course until the D.M.P. was twice the DLat. Calculate the Latitude reached.
Lat. 60˚ 20’ N or S
By sailing due East for a distance of 245 nautical miles, a ship alters her longitude by 7˚25’. Find Latitude of the ship.
Lat. 56˚ 36’ N or S
Find the distance between initial position at Lat1. 50˚0’ N; 178˚0’ W and Lat2. 50˚00’ N; Long. 179˚ 00’E.
116 nm
Your ship departs Yokohama, Japan from position Lat. 35˚27’ N; Long. 139˚39’ E bound for San Francisco, California,USA. At position Lat. 37˚48.5’ N, Long. 122˚24’ W. Determine the course and distance by Mercator sailing only.
088.3˚T; dist. 4738.4 miles
Your ship departs Yokohama, Japan from position Lat. 35˚27’ N; Long. 139˚39’ E bound for San Francisco, California,USA. At position Lat. 37˚48.5’ N, Long. 122˚24’ W. Determine the distance by Great Circle sailing.
4473 miles
Your ship departs Yokohama, Japan from position Lat. 35˚27’ N; Long. 139˚39’ E bound for San Francisco, California,USA. At position Lat. 37˚48.5’ N, Long. 122˚24’ W. Determine the initial course by Great Circle sailing.
054.3˚T
Your ship departs Yokohama, Japan from position Lat. 35˚27’ N; Long. 139˚39’ E bound for San Francisco, California,USA. At position Lat. 37˚48.5’ N, Long. 122˚24’ W. Determine the Latitude of the Vertex (Lv) by Great Circle sailing.
Lv = 48˚35.9’ N
Your ship departs Yokohama, Japan from position Lat. 35˚27’ N; Long. 139˚39’ E bound for San Francisco, California,USA. At position Lat. 37˚48.5’ N, Long. 122˚24’ W. Determine the Longitude of the Vertex (Lv) by Great Circle sailing.
Longv = 169˚14’ W
Determine the great circle distance and intial course from Lat. 27˚51’ N; Long. 071˚41’ W to Lat. 49˚ 45’ N; Long. 006˚14’ W ?
3214 nm, 046.9˚T
Determine the great circle distance and intial course from Lat. 36˚00’ S; Long. 056˚00’ W to Lat. 34˚ 00’ N; Long. 018˚15’ E ?
3557 nm; 112˚T
Determine the great circle distance and intial course from Lat. 24˚52’ N; Long. 078˚27’ W to Lat. 47˚ 19’ N; Long. 006˚ 42’ W ?
3593 nm; 048.1˚T
The great circle distance from Lat. 35˚57.2’ N, Long. 005˚45.7’ W to Lat. 24˚25.3’ N; Long 083˚02.6’ W is 3966.5 nautical miles and the initial course is 283.7˚T. The latitude of the vertex is 38˚09.4’ N. What is the longitude of the vertex?
028˚ 18.5’ W
The great circle distance from Lat. 08˚50’ N, Long. 080˚21’ W to Lat. 12˚36’ N; Long 128˚16’ E is 8664 nautical miles and the initial course is 306.6˚T. The latitude of the vertex is 37˚39.6’ N. What is the longitude of the vertex?
157˚44’ W
You are on a great circle track departing from LAT. 25˚50’ N; LONG. 077˚00’ W and your initial course is 061.7˚T. The position of the vertex is LAT 37˚35.6’ N; LONG. 025˚57.8’ W. What is the distance along the great circle track between the point of dep
2664.9 nm
The great circle distance from Lat. 35˚08’ S, Long. 019˚26’ E to Lat. 33˚16’ S; Long 115˚36’ E is 4559 nautical miles and the initial course is 121˚T. Determine the latitude of the vertex?
45˚30’ S
The latitude and longitude of the vertex along your great circle course is 38˚15’S, 168˚19’W. Your vessel is on course 102˚T. Which of the following is your course when crossing the equator?
051.8˚T
The latitude and longitude of the vertex along your great circle course is 38˚15’S, 168˚19’E. Your vessel is on course 060˚T. Which of the following is your longitude when crossing the equator?
101˚21’ W
The latitude and longitude of the vertex along your great circle course is 43˚32’S, 039˚18’ E. Your vessel is on course 246˚T. Which of the following is your course when crossing the equator?
313.5˚ T
A great circle crosses the equator at 134˚ E. It will also cross the equator at what other longitude?
046˚ W
A great circle crosses the equator at 114˚ E. It will also cross the equator at what other longitude?
066˚ W
A great circle crosses the equator at 114˚ W. It will also cross the equator at what other longitude?
066˚ E
A great circle crosses the equator at 086˚ E. It will also cross the equator at what other longitude?
094˚ W
A great circle crosses the equator at 157˚ W. It will also cross the equator at what other longitude?
023˚ E
A great circle crosses the equator at 049˚ W. It will also cross the equator at what other longitude?
131˚ E
A great circle crosses the equator at 102˚ E. It will also cross the equator at what other longitude?
078˚ W
A great circle crosses the equator at 012˚ 35’ E. It will also cross the equator at what other longitude?
167˚ 25’ W
A great circle crosses the equator at 032˚ 35’ W. It will also cross the equator at what other longitude?
147˚25’ E
A great circle crosses the equator at 078˚ 45’ E. It will also cross the equator at what other longitude?
101˚15’ W
A great circle crosses the equator at 120˚ E. It will also cross the equator at what other longitude?
060˚ W
A great circle crosses the equator at 120˚ W. It will also cross the equator at what other longitude?
060˚ E
The longitude of the upper vertex of a great circle track is 169˚ E. What is the longitude of the lower vertex?
011˚ W
The longitude of the upper vertex of a great circle track is 011˚ W. What is the longitude of the lower vertex?
169˚ E
The longitude of the upper vertex of a great circle track is 134˚ E. What is the longitude of the lower vertex?
046˚ W
The latitude of the upper vertex of a great circle is 36˚ N. What is the latitude of the lower vertex?
36˚ S
The latitude of the upper vertex of a great circle is 63˚ N. What is the latitude of the lower vertex?
63˚S
The latitude of the upper vertex of a great circle is 27˚ N. What is the latitude of the lower vertex?
27˚S
The latitude of the upper vertex of a great circle is 54˚ S. What is the latitude of the lower vertex?
54˚N
The latitude of the upper vertex of a great circle is 46˚ S. What is the latitude of the lower vertex?
46˚N
The latitude of the upper vertex of a great circle is 30˚ S. What is the latitude of the lower vertex?
30˚N
What is the difference of longitude between the intersection of the great circle and the equator to the lower vertex?
90 deg.
What is the difference of longitude between the intersection of the great circle and the equator to the upper vertex?
90 deg.
The vertex of a great circle track in Long. 109˚ E. An eastbound vessel will cross the equator in what longitude?
161˚ W
The vertex of a great circle track is Long. 121˚ E. An eastbound vessel will cross the equator in what longitude?
149˚ W
The vertex of a great circle track is Long. 134˚ E. An eastbound vessel will cross the equator in what longitude?
136˚W
The vertex of a great circle track is Long. 029˚ E. An eastbound vessel will cross the equator in what longitude?
119˚ E
The vertex of a great circle track is Long. 079˚ E. An eastbound vessel will cross the equator in what longitude?
169˚ E
The vertex of a great circle track is Long. 029˚ W. An eastbound vessel will cross the equator in what longitude?
061˚ E
The vertex of a great circle track is Long. 029˚ W. A westbound vessel will cross the equator in what longitude?
119˚ W
The vertex of a great circle track is Long. 134˚ E. A westbound vessel will cross the equator in what longitude?
044˚E
The vertex of a great circle track is Long. 109˚ E. A westbound vessel will cross the equator in what longitude?
019˚ E
The vertex of a great circle track is Long. 121˚ E. A westbound vessel will cross the equator in what longitude?
031˚ E
The vertex of great circle track is Long. 121˚ W. An eastbound vessel will cross the equator in what longitude?
031˚ W
The upper vertex of great circle track is at Long. 158˚ W. An eastbound vessel will cross the equator in what longitude?
068˚ W
The upper vertex of great circle track is Long. 144˚ W. A westbound vessel will cross the equator in what longitude?
126˚ E
The vertex of great circle track is Long. 168˚ W. An eastbound vessel will cross the equator in what longitude?
078˚ W
The difference of longitude between the upper vertex and the lower vertex of a great circle is _____.
180 deg.
A ship following a great circle track crosses the equator at long. 135˚ 00’ E on course 051.8˚T. If she continues along this great circle track, find the latitude and longitude of the upper vertex.
Lat. 38˚12’ N; Long. 135˚ 00’ W
Determine the latitude and longitude of the vertex along your great circle track when going from Lat. 35˚ 17.6’ N; Long.144˚ 23’ E to Lat.47˚ 36’ N; Long. 124˚ 22’ W.
Lat. 52˚47.8’ N; Long. 158˚ 07.3’ W
Determine the great circle distance and initial course from Lat 08˚ 36’ N, Long. 126˚ 17’ E to Lat. 02˚12’ S, Long. 081˚ 53’ W.
9076 miles, 079˚T
The great circle distance from Lat. 38˚17’ N; Long. 123˚ 16’ W to Lat. 35˚ 01’ N; Long. 142˚ 21’ E is 4330 nautical miles and the initial course is 300.9˚ T Determine the latitude and longitude of the vertex.
Lat. 47˚39.5’ N; Long. 167˚ 18.5’ W
You receive a distress call from a vessel reporting her position as Lat. 30˚21’ N; Long. 088˚34’ W. Your position is at Lat. 24˚30’ N; Long. 083˚00’ W. Determine the true course and distance to the distress scene by Mercator Sailing.
320˚ T; dist. 460 nm
By Mercator sailing, determine the course and distance when sailing from Lat 43˚08’ N; Long. 005˚56’ E to Lat. 39˚ 29’ N.; Long. 000˚ 24’ W.
233˚T, 361 miles
By Mercator sailing, determine the course and distance when sailing from Lat 00˚00’ ; Long. 000˚03’ W to Lat. 51˚ 12’ N.; Long. 016˚ 14’ E.
015˚T, 3185 nm
By Mercator sailing, determine the course and distance when sailing from Lat 15˚12’ S; Long. 002˚12’ E to Lat. 28˚ 49’ S.; Long. 017˚ 14’ E.
134˚T, 1171 miles
By Mercator sailing, determine the course and distance when sailing from Lat 08˚04’ S; Long. 034˚53’ W to Lat. 14˚ 45’ N.; Long. 017˚ 33’ W.
037˚ T, 1718 miles
A vessel at Lat. 38˚ 03’ S, Long. 049˚ 38’ W heads for a destination at Lat, 41˚ 26’ S, Long. 038˚ 32’ W. Determine the true course and distance by Mercator Sailing.
111.5˚
A vessel at Lat. 21˚ 18.5’ N, Long. 157˚ 52.2’ W heads for a destination at Lat, 08˚ 53’ N, Long. 079˚ 31’ W. Determine the true course and distance by Mercator Sailing.
099˚ T, 4617.5 miles
A vessel steams 1082 miles on course 047˚ T from lat. 37˚18’ N; Long. 024˚ 40’ W. What is the latitude and longitude of the point of arrival by Mercator Sailing.
Lat. 49˚36’ N; Long. 006˚ 28’ W
A vessel at Lat. 28˚ 00’ N, Long. 116˚ 00’ W heads for a destination at Lat, 34˚ 00’ N, Long. 123˚ 40’ W. Determine the true course and distance by Middle Latitude Sailing.
312˚ T, 533 miles
A vessel at Lat. 20˚ 10’ N, Long. 122˚ 00’ E heads for a destination at Lat, 26˚ 18’ N, Long. 128˚ 20’ E. Determine the true course and distance by Middle Latitude Sailing.
043.5˚ T, 507.3 miles
A vessel at Lat. 49˚ 45’ N, Long. 006˚ 35’ W heads for a destination at Lat, 25˚ 50’ N, Long. 077˚ 00’ W. Determine the true course and distance by Mercator or middle latitude Sailing.
246˚ T, 3597 miles
A ship sailed on course 326˚T from Latitude 20˚ 58.8’ S, Long. 012˚ 37.6’ E. For a distance of 311 nautical miles. Find the arrival longitude by mercator sailing.
Lat. 16˚41’ N; Long. 009˚ 34.9’ E
A ship sails from Lat. 30˚20’ N and steams going south (180) for a distance of 72 miles. What is her arrival latitude?
29˚ 08’ N
A ship sails from Lat. 20˚30’ N and steams going south (180) for a distance of 72 miles. What is her arrival latitude?
19˚18’ N
A ship sails from Lat. 03˚20’ N and steams going south (180) for a distance of 182 miles. What is her arrival latitude?
00˚18’ N
A ship sails from Lat. 30˚20’ S and steams going south (180) for a distance of 180 miles. What is her arrival latitude?
33˚20’ S
A ship sails from Lat. 46˚22’ S and steams going south (180) for a distance of 372 miles. What is her arrival latitude?
52˚34’ S
A ship sails from Lat. 52˚34’ S and steams going north (000) for a distance of 372 miles. What is her arrival latitude?
46˚22’ S
A ship sails from Lat. 52˚34’’ S and steams going south (180) for a distance of 372 miles. What is her arrival latitude?
58˚46’ S
A ship sails from Lat. 34˚54’ N and steams going south (180) for a distance of 372 miles. What is her arrival latitude?
28˚42’ N
A ship sails from Lat. 34˚54’ N and steams going north (000) for a distance of 372 miles. What is her arrival latitude?
41˚06’ N
A ship sails from Lat. 46˚22’ N and steams going south (180) for a distance of 372 miles. What is her arrival latitude?
40˚10’ N
At 1210 LZT, on 01 December 2007, you depart Seattle at Lat. 47˚ 36’ N; Long. 122˚ 22’ W (ZD+8). You are bound for Guam, Lat 13˚ 27’ N; Long. 144˚ 37’ E and you estimate your speed of advance at 20 knots. The distance is 4,948 miles. What is your estimated zone time of arrival in Guam?
1334, 12 December
At 0915 LZT, on 07 November 2007, you depart Seattle at Lat. 47˚ 36’ N; Long. 122˚ 22’ W (ZD+8). You are bound for Kobe, Lat 34˚ 40’ N; Long. 135˚ 12’ E and you estimate your speed of advance at 18.5 knots. The distance is 4,527 miles. What is your estimated zone time of arrival at Kobe?
0657, 18 November
At 1820 LZT, on 21 March 2007, you depart San Francisco at Lat. 37˚ 48.5’ N; Long. 122˚ 24’ W (ZD+8). You are bound for Melbourne, Lat 37˚ 49.2’ S; Long. 144˚ 56’ E and you estimate your speed of advance at 21 knots. The distance is 6,970 miles. What is your estimated zone time of arrival at Melbourne?
0814, 05 April
At 0915 LZT, on 26 July 2007, you depart Yokohama at Lat. 37˚ 27’ N; Long. 139˚ 39’ E (ZD-9). You are bound for Seattle, Lat 47˚ 36’ N; Long. 122˚ 22’ W and you estimate your speed of advance at 14 knots. The distance is 4,245 miles. What is your estimated zone time of arrival at Seattle?
0728, 07 August
At 0600 LZT, on 22 October 2007, you depart Manila at Lat. 14˚ 35’ N; Long. 120˚ 58’ E (ZD-8). You are bound for Los Angeles, Lat 33˚ 46’ N; Long. 118˚ 11’ W and you estimate your speed of advance at 20.2 knots. The distance is 6385.9 miles. What is your estimated zone time of arrival at Los angeles?
1808, 03 November
At 0530 LZT, on 20 December 2007, you depart Capetown, South Africa (ZD-1). You are bound for New York (ZD +5), and you estimate your speed of advance at 25 knots. The distance is 6762 miles. What is your estimated zone time of arrival at New York?
0600, 31 December
Your ship will sail from a position in LAT 08˚51’N; LONG. 081˚31’ W to position at LAT 33˚ 51.5’ S; LONG 151˚13’ E. The distance by great circle is 7635 miles, and you estimate an average speed of 15 knots. Find your estimated zone time of arrival if you depart at 1510 ZT on July 23?
1110, 14 August
You are on a voyage from New York, USA, to San Francisco, USA. The distance from pilot to pilot is 5132 miles. The speed of advance is 13.5 knots. You estimate 32 hours for bunkering at Colon, and 14 hours for the Panama Canal Transit. If you take departure at 0600 hours (ZD+4) on 16 May, what is your ETA (ZD+7) at San Francisco?
2109, 02 June
You are on a voyage from Limoy, Costa Rica, to Los angeles, USA. The distance from pilot to pilot is 3150 miles. The speed of advance is 14 knots. You estimate 24 hours for bunkering at Colon, and 12 hours for the Panama Canal Transit. If you take departure at 1836 hours (ZD+6) on 28 January, find your ETA (ZD+8) at Los angeles?
1336, 08 February
You are on a voyage from Baltimore,Mainland USA, to Seattle, Washington, USA. The distance from pilot to pilot is 5960 miles. The speed of advance is 16 knots. You estimate 16 hours for bunkering at Colon, and 12 hours for the Panama Canal Transit. If you take departure at 0824 hours (ZD+5), 18 November, find ETA (ZD+8) at Seattle?
2154, 04 December
You are on a voyage from Halifax, Nova Scotia, to Galveston, TX. The distance from pilot to pilot is 2138 miles. The speed of advance is 12.5 knots. You estimate 18 hours for bunkering enroute at Port Everglades, FL. If you sail at 0648 hours (ZD+4), on, on June 12, what is your ETA (ZD+5) at Galveston?
0250, 20 June
You are on a voyage from Valdez, Alaska, to the Panama Canal. The distance from pilot to pilot is 4950 miles. The speed of advance is 15 knots. You estimate a layover at San Francisco, CA of 36 hours If you take departure at 0800 hours (ZD+10), on 29 October, what is your ETA (ZD+5) at Panama Canal?
1900, 13 November
You are on a voyage from Belem. Brazil, to Mobile, Alabama. The distance from pilot to pilot is 3150 miles. The speed of advance is 14 knots. You estimate a layover at San Juan, Puerto Rico of 17.5 hours If you take departure at 2200 hours (ZD+3h 30m), on 26 February 2007, what is your ETA (ZD+6) at Mobile?
2200, 08 March
At 0915 zone time, on 06 March, you depart Sydney, Australia in LAT. 33˚ 51.5’ S; LONG. 151˚ 13.0’ E (ZD-10). You are bound for Kodiak, LAT. 57˚ 47’ N; LONG. 152˚ 25.0’ W. If you estimate your speed of advance to be 21 knots and the distance is 6,222 miles. What is your ETA at Kodiak?
2132, 17 March
You are on a voyage from San Diego, CA, to New York, USA. The distance from pilot to pilot is 4860 miles. The speed of advance is 15 knots. You estimate 18 hours for bunkering at Colon, and 14 hours for the Panama Canal Transit. If you take departure at 0836 hours (ZD+7), 4 July, what is your ETA (ZD+4) at New York?
0736, 19 July
At 0800 zone time, on 15 April, your vessel is heading west in position LAT.15˚ 10’ N; LONG. 165˚15’ W at a speed of 22 knots. The distance to your destination at LAT. 15˚ 10’ N; LONG. 135˚ 15’ E is 3600 nautical miles. What is your ETA ?
2339, 22 April
On Novemeber 21 at 2100 zone time,you depart Pt. A (ZD+5) enroute to Pt. B (ZD+1). The total distance is 3519 nautical miles. What will be the speed to use in order to arrive at Pt. B on December 3 at 1830 zone time?
12.5 knots
On September 13 at 1936 hours, your ship was in Lat. 21˚32’ N; Long. 070˚ 18’ W. On Sept. 14 at 1854 hours, your ship was in Lat. 018˚ 15’ N; Long. 065˚ 24’ W. What is your speed if your total distance run is 341 nautical miles?
15.3 knots
You are departing San Francisco, California (ZD+8) on Oct. 10 at 1200 LZT bound for Yokohama, japan (ZD+9) with a total distance of 4536 miles. What will be your approximate speed if you plan to arrive Yokohama on Oct. 19 at about 1900 LZT?
22.0 knots
The GMT is 0445 hours and your zone description is +1, your local zone time is _____.
345 hours
You are at longitude 124˚00’ E and your local mean time is 0520H on the 5th of the month. What is the mean time at Greenwich?
2104H on the 4th
The LMT of sunrise as tabulated in the Nautical Almanac indicates 05h 52 min. You are at Longitude 099˚ 15’E. What will be the LZT of sunrise?
0615H
The LMT of sunrise as tabulated in the Nautical Almanac indicates 05h 52 min. You are at Longitude 099˚ 15’W. What will be the LZT of sunrise?
0529H
The LMT of sunrise as tabulated in the Nautical Almanac indicates 05h 52 min. You are at Longitude 090˚ 00’E. What will be the LZT of sunrise?
0552H
The LMT of sunrise as tabulated in the Nautical Almanac indicates 05h 52 min. You are at Longitude 099˚ 15’E. What will be the GMT of sunrise?
2315H
The LMT of sunrise as tabulated in the Nautical Almanac indicates 05h 52 min. You are at Longitude 099˚ 15’W. What will be the GMT of sunrise?
1229H
The LMT of sunrise as tabulated in the Nautical Almanac indicates 05h 52 min. You are at Longitude 120˚ 00’E. What will be the LZT of sunrise?
0552H
The LMT of sunrise as tabulated in the Nautical Almanac indicates 05h 52 min. You are at Longitude 124˚ 00’ E. What will be the LZT of sunrise?
0536H
The LMT of sunrise as tabulated in the Nautical Almanac indicates 05h 52 min. You are at Longitude 116˚ 00’ E. What will be the LZT of sunrise?
0608H
The LMT of sunrise as tabulated in the Nautical Almanac indicates 06h 00 min. You are at Longitude 116˚ 00’ E. What will be the LZT of sunrise?
0616H
The LMT of sunrise as tabulated in the Nautical Almanac indicates 06h 00 min. You are at Longitude 124˚ 00’ E. What will be the LZT of sunrise?
0544H
The LMT of sunrise as tabulated in the Nautical Almanac indicates 05h 52 min. You are at Longitude 120˚ 00’W. What will be the LZT of sunrise?
0552H
The LMT of sunrise as tabulated in the Nautical Almanac indicates 05h 52 min. You are at Longitude 116˚ 00’W. What will be the LZT of sunrise?
0536H
The LMT of sunrise as tabulated in the Nautical Almanac indicates 05h 52 min. You are at Longitude 124˚ 00’W. What will be the LZT of sunrise?
0608H
The LMT of sunrise as tabulated in the Nautical Almanac indicates 05h 52 min. You are at Longitude 075˚ 00’W. What will be the LZT of sunrise?
0552H
The LMT of sunrise is 04h 30min. At LAT. 48˚55’ N. LONG. 078˚ 18’ W. Find the GMT of sunrise.
9h 43m 12s
The equation of time is12m 00s and the mean sun is ahead of the apparent sun. If you are in the central meridian of your time zone, at what zone time will the apparent sun cross the meridian?
1212H
The equation of time is12m 00s and the apparent sun is ahead of the mean sun. If you are in the central meridian of your time zone, at what zone time will the apparent sun cross the meridian?
1148H
The equation of time is16m 00s and the apparent sun is ahead of the mean sun. If you are in the central meridian of your time zone, at what zone time will the apparent sun cross the meridian?
1144H
The equation of time is16m 00s and the mean sun is ahead of the apparent sun. If you are in the central meridian of your time zone, at what zone time will the apparent sun cross the meridian?
1216H
The LMT of meridian passage taken from the nautical almanac indicates 1210H. You are at longitude 070˚ 30’ E. What time would you use to enter in the nautical almanac to determine the declination of the sun at local apparent noon (LAN)?
0728H
What is the geographical latitude of a body whose declination is 23˚27’ N?
23˚ 27’N
What is the geographical latitude of star “Deneb” whose declination is 45˚16’ N?
45˚ 16’ N
What is the geographical latitude of star “Rigel” whose declination is 08˚ 12’ S?
08˚ 12’ S
What is the geographical latitude of a body whose declination is 66˚33’ S?
66˚ 33’S
What is the geographical longitude of a body whose GHA is 127˚ 33’ ?
127˚ 33’ W
What is the geographical longitude of a body whose GHA is 149˚30’ ?
149˚ 30’ W
What is the geographical longitude of a body whose GHA is 232˚27’ ?
127’ 33’ E
What is the geographical longitude of a body whose GHA is 210˚ 30’ ?
149˚ 30’ E
What is the geographical longitude of a body whose GHA is 279˚30’ ?
080˚ 30’ E
The GP of a celestial body is Lat. 20˚ 36’ S and Long. 074˚ 10’ E. Find its GHA and declination on the celestial sphere.
GHA = 285˚ 50’ Dec. = 20˚ 36’ S
The GP of a celestial body is Lat. 15˚ 40’ S and Long. 074˚ 10’ W. Find its GHA and declination on the celestial sphere.
GHA = 074˚ 10’ Dec. = 15˚ 40’ S
The GP of a celestial body is Lat. 45˚ 00’ N and Long. 090˚ 00’ E. Find its GHA and declination on the celestial sphere.
GHA = 270˚ 00’ Dec. = 45˚’00’ N
The GP of a celestial body is Lat. 23˚ 27’ N and Long. 114˚ 20’ W. Find its GHA and declination on the celestial sphere.
GHA = 114˚ 20’ Dec. = 23˚’27’ N
A vessel heading magnetic north and its magnetic compass indicates a heading of 356 deg. What action should be done to remove this error during compass adjustment?
If the red ends of the magnets are to starboard, and the athwartship tray is at the top, you should add some more magnets
A vessel is heading magnetic east and its magnetic compass indicates a heading of 076 deg. What action should be taken to remove this error during compass adjustment?
If the blue ends of the magnets are aft, and the fore-and-aft tray is at the top, you should add some magnets
A vessel is heading magnetic east and its magnetic compass indicates a heading of 086 deg. What action should be taken to remove this error during compass adjustment?
If the blue ends of the magnets are aft, and the fore-and-aft tray is at the top, you should add some magnets
A vessel is heading magnetic east and its magnetic compass indicates a heading of 086 deg. What action should be taken to remove this error during compass adjustment?
If the red ends of the magnets are aft, you should lower the fore-and-aft tray
A vessel is heading magnetic east and its magnetic compass indicates a heading of 093 deg. What action should be taken to remove this error during compass adjustment?
If the red ends of the magnets are forward, and the fore-and-aft tray is at the bottom, you should remove some magnets
A vessel is heading magnetic east and its magnetic compass reads a heading of 093 deg. What action should be taken to remove this error during compass adjustment?
If the red ends of the magnets are aft, you should raise the fore and aft tray.
A vessel is heading magnetic east and its magnetic compasss indicates a heading of 086 deg. What actio should be taken to remove this error during compass adjustment?
If the blue ends of the magnets are aft, and the fore and aft tray is at the top, you should add some magnets
A vessel is heading magnetic east and its magnetic compasss indicates a heading of 093 deg. What action should be taken to remove this error during compass adjustment?
If the blue ends of the magnets are forward you should raise the fore-andf-aft tray
A vessel is heading magnetic north and its magnetic compass indicates a heading of 003 deg. What action should be done to remove this error during compass adjustment?
Raise or lower the athwartship magnets
A vessel is heading magnetic north and its magnetic compass indicates a heading of 003 deg. What action should be done to remove this error during compass adjustment?
If the red ends are to starboard, the athwarthship magnets should be lowered
A vessel is heading magnetic north and its magnetic compass indicates a heading of 356 deg. What action should be done to remove this error during compass adjustment?
If the red ends of the magnets are to port, you should lower the athwartship tray tray
A vessel is heading magnetic north and its magnetic compass is indicating a heading of 356 deg. What action should be taken to remove this error during compass adjustment?
If the blue ends of the magnets are to starboard, and the athwartship tray is at the bottom, you should remove some magnets
A vessel is heading magnetic north and its magnetic compass is indicating is heading of 003 deg. What action should be taken to remove this error during compass adjustment?
If the red ends are to starboard, and the athwartship tray is at the bottom, you should remove some magnets.
A vessel is heading magnetic northwest and its magnetic compass indicates a heading of 312 deg. What action should be done to remove this error during compass adjustment?
Any of these
A vessel is heading magnetic northwest and its magnetic compass indicates a heading of 312 deg. What action should be taken to remove this error during compass adjustment?
If the quadrantal spheres are all the way out, replace them with smaller spheres
A vessel is heading magnetic northwest and its magnetic compass indicates a heading of 317 deg. What action should be taken to remove this error during compass adjustment?
If the quadrantal spheres are in as far as possible, replace them with larger spheres
A vessel is heading magnetic northwest and its magnetic compass reads a heading of 317 deg. What action should be taken to remove this error dutring compass adjustment?
Move the quadrantal spheres in
