Navigation General - Module Exam Flashcards
What color light would a nun buoy display at night?
Select one:
a.
Green
b.
Red
c.
Yellow
d.
Blue
b.
Red
The difference in degrees between magnetic north and true north is known as _____________________
Select one:
a.
Drift
b.
Variation
c.
Deviation
d.
PSC
b.
Variation
What would give the best radar echo?
Select one:
a.
A 100-foot fishing vessel with a radar reflector in its rigging.
b.
A 300-foot tanker, bow on.
c.
A 600-foot freighter, beam on.
d.
The beam of a three masted sailing vessel with all sail set.
c.
A 600-foot freighter, beam on.
Private aids to navigation used in or along navigable waters of the United States may be listed in the ________________________.
Select one:
a.
Aids to Navigation Manual
b.
List of Private Aids
c.
Light List
d.
Sailing Directions
c.
Light List
On a Mercator chart, 1 nautical mile is equal to…
Select one:
a.
1 minute of latitude
b.
1 minute longitude
c.
1 degree of longitude
d.
1 degree of latitude
a.
1 minute of latitude
If you see several fixed navigational lights that are visible at the same time, each one may be positively identified by checking all of the following except what against the Light List?
Select one:
a.
Intensity
b.
Rhythm
c.
Period
d.
Color
a.
Intensity
The period of a lighted aid to navigation refers to the ________________.
Select one:
a.
length of time between flashes of the light
b.
date of construction or establishment
c.
time required for the light to complete each cycle
d.
time required for the longest flash of each cycle
c.
time required for the light to complete each cycle
What information does the outer ring of a compass rose on a nautical chart provide?
Select one:
a.
Annual rate of variation change
b.
Variation
c.
Magnetic directions
d.
True directions
d.
True directions
The term “flood Current” refers to that period of time when the water _____________________.
Select one:
a.
Is moving towards the ocean
b.
Is flowing towards land
c.
Level is rising because of heavy rains
d.
Level is not changing
b.
Is flowing towards land
When using a Mercator chart, 1 nautical mile is equal to ________________________.
Select one:
a.
1 minute longitude
b.
1 minute of latitude
c.
1 degree of latitude
d.
1 degree of longitude
b.
1 minute of latitude
The best method to stop a vessel from dragging anchor in a sand bottom is to _________.
Select one:
a.
reduce the length of the cable
b.
swing the rudder several times to work the anchor into the bottom
c.
pay out more anchor cable
d.
back the engines
c.
pay out more anchor cable
The datum used for soundings on charts covering the East Coast of the United States is _____________________________.
Select one:
a.
Mean low water springs
b.
Mean low water
c.
Mean lower low water
d.
Half tide level
c.
Mean lower low water
To safely anchor a vessel there must be sufficient “scope” in the anchor cable. Scope is the ratio of_______________.
Select one:
a.
Length of anchor to depth of water
b.
Weight of cable to weight of anchor
c.
Weight of cable to weight of vessel
d.
Length of cable to depth of water
d.
Length of cable to depth of water
While underway you observe a buoy off station. You should _______________________.
Select one:
a.
notify Coast Guard Headquarters in Washington, D.C.
b.
immediately contact the nearest Coast Guard office by radiophone
c.
fill out and mail CG Form 2692 to the nearest Coast Guard office
d.
appear in person at the nearest Coast Guard office
b.
immediately contact the nearest Coast Guard office by radiophone
The light rhythm of Morse (A) is shown on what type of buoy(s).
Select one:
a.
Safe water buoys
b.
Preferred-channel buoys
c.
Special marks
d.
Starboard or port-side buoys
a.
Safe water buoys
How many high water tides usually occur each day on the East Coast of the United States?
Select one:
a.
Three
b.
Four
c.
Two
d.
One
c.
Two
A nun buoy will…
Select one:
a.
Be green in color
b.
Have an even number
c.
Be cylindrical in shape
d.
Be left to port when entering from seaward
b.
Have an even number
In the U.S. Aids to Navigation System, red and green horizontally banded buoys mark…
Select one:
a.
General anchorage areas
b.
Junctions or bifurcation
c.
Fishing grounds
d.
Channels for shallow draft vessels
b.
Junctions or bifurcation
What are the defined characteristics of an isophase light?
Select one:
a.
1 sec. Flash, 1 sec. Eclipse
b.
6 sec. Flash, 3 sec. Eclipse
c.
4 sec. Flash, 2 sec. Eclipse, 3 sec. Flash, 2 sec. eclipse
d.
2 sec. Flash, 5 sec eclipse
1 sec. Flash, 1 sec. Eclipse
In the U.S Aids to Navigation system a nun buoy will ________________
Select one:
a.
Be left to port when entering from seaward
b.
Be green in color
c.
Be cylindrical in shape
d.
Have an even number
d.
Have an even number
Your vessel is aground in soft mud. You would have the best chance of refloating it on the next tide if it grounded at _____________________.
Select one:
a.
High water neap
b.
Low water neap
c.
Low water spring
d.
High water spring
c.
Low water spring
The four standard light colors used for aids to navigation that are lighted are red, green, white, and __________________________.
Select one:
a.
Purple
b.
Yellow
c.
Orange
d.
Blue
b.
Yellow
A light that has a light period shorter than its dark period is described as _______________.
Select one:
a.
flashing
b.
pulsating
c.
occulting
d.
alternating
a.
flashing
The lubber’s line on a magnetic compass indicates__________.
Select one:
a.
compass north
b.
magnetic north
c.
a relative bearing taken with an azimuth circle
d.
the direction in which the boat’s bow is heading.
d.
the direction in which the boat’s bow is heading.
The difference between the heights of low and high tide is the…
Select one:
a.
Depth
b.
Period
c.
Range
d.
Distance
c.
Range
Which buoy below may be odd numbered?
Select one:
a.
Unlighted can buoy
b.
A yellow buoy
c.
A spherical buoy
d.
A red buoy
a.
Unlighted can buoy
Red sectors of navigational lights warn mariners of…
Select one:
a.
Heavily trafficked areas
b.
Shoals or nearby land
c.
Recently sunken vessels
d.
Floating debris
b.
Shoals or nearby land
By paying out more anchor cable, you_________.
Select one:
a.
increase the holding power of your anchor
b.
increase the possibility that your vessel will drag anchor
c.
decrease the holding power of your anchor
d.
decrease the swing of your vessel while at anchor
a.
increase the holding power of your anchor
If you observe a buoy off station you should…
Select one:
a.
Fill out and mail CG Form 2692 to the nearest Coast Guard office
b.
Immediately contact the nearest Coast Guard office by radiophone
c.
Appear in person at the nearest Coast Guard office
d.
Notify Coast Guard Headquarters in Washington, D.C.
b.
Immediately contact the nearest Coast Guard office by radiophone
Which term refers to the direction a current is flowing?
Select one:
a.
Drift
b.
Set
c.
Vector direction
d.
Stand
b.
Set
Your vessel is aground in soft mud. You would have the best chance of refloating it on the next tide if it grounded at _____________________.
Select one:
a.
High water neap
b.
Low water neap
c.
Low water spring
d.
High water spring
c.
Low water spring
