#4 Navigation Stack 91-150 Flashcards
When are maneuvering signals sent in meeting or crossing situations in international waters?
During actual maneuvers (not intentions).
What navigation rule makes it impossible for a stand-on vessel to avoid responsibility for a collision by stubbornly maintaining their right of way when immediate danger of collision is evident?
Responsibility Rule.
Ships engaged in UNREP have right-of-way over what units?
Units conducting flight operations.
What is the most difficult factor in “zero visibility” shiphandling during sea and anchor detail?
Detecting and avoiding other craft in the harbor.
What is a primary reason for keeping a timely navigation plot in CIC at all times?
Instantaneous position always available and extremely valuable in an emergency (SAR, MOB).
With respect to shiphandling, what distance can be considered a minimum open-sea safe separation range to avoid collision?
1,000 yards.
You are in a meeting situation with a contact dead at the bow, range 10,000 yards. What is the minimum rate of bearing drift per 1,000 yards of closure that will ensure a minimum safe CPA of 1,000 yards?
.5 per 1,000 yards.
You are in a meeting situation with a contact dead at the bow, range 10,000 yards. The range has closed to 6,000 yards. What bearing drift will now ensure a 1,000 yard CPA?
2.0 per 1,000 yards of closure.
When are sailing and fishing vessels prohibited from impeding the passage of a larger vessel?
In a narrow channel in which the larger vessel is restricted in her ability to maneuver.
Your ship is overtaking another ship. Does a subsequent alteration of the bearing between the two ships change the situation under the ROR?
No. The overtaking vessel remains responsible for the safety of the passing until past and clear.
When may a stand-on vessel maneuver in a crossing situation?
To avoid collision, as soon as it becomes evident that the give-way vessel does not intend to maneuver.
What maneuver should be avoided in a crossing situation by a stand-on vessel?
Turning to port if the other vessel is on the port hand.
During restricted visibility, what actions are to be taken by a ship that detects a vessel by radar alone?
Use radar as a practical aid to navigation in determining whether a close-quarters situation exists. Take action in ample time to avoid collision, if required.
When marking line of demarcation separating inland and international waters, how is it drawn?
Straight line across mouth of harbor.
What does a large scale chart cover?
Small area.
What range of photographic scale constitutes a large scale chart?
1:5000 to 1: 9999.
Where is the sounding unit of measure indicated on a chart?
In bold type outside the chart border and beneath the chart title.
What chart category includes predetermined mine clearance passages (Q- Routes)?
Six digit category. Mine warfare planning charts.
What chart symbology signifies more complete sounding data?
A continuous depth contour broken occasionally by depth values.
Under the ROR, what is signified by an orange smoke signal, flames on a vessel from a burning oil or tar barrel, or continuous sounding of fog signals?
Vessel in distress.
When is a signal of intention always required under both international and inland ROR?
When overtaking another vessel or when in danger.
What is the point at which the ship will rotate around the anchor?
Drag circle.
For large-area sail planning, what is the shortest distance route between any two points on the earth?
Great circle.
What major chart type represents the largest area charts?
General and Sailing charts (1:150,000 and smaller).
