ASA 105 Costal Navigation Latest Update 2025- 2026 170 Questions and 100% Verified Correct Answers Guaranteed A+
-CORRECT ANSWER: From the bow view, a tug boat shows this many white lights if
having a tow more than 200m astern.
-CORRECT ANSWER: If approaching a harbor have this prepared to drop incase of
running aground. Will help prevent further grounding and help kedging off.
- foot -CORRECT ANSWER: A one inch drop in barometric pressure will rise the tide
approximately this many feet.
- Hour -CORRECT ANSWER: Traditional amount of time between plotting DR position.
1 Nautical Mile -CORRECT ANSWER: Equal to 1 minute latitude.
1 prolonged (every two minutes) -CORRECT ANSWER: Fog signal blast pattern for
motoring boats.
- prolonged, 2 short (every 2 minutes) -CORRECT ANSWER: Fog signal blast pattern
for a sail boat.
- short, 1 long, 1 short (every minute) -CORRECT ANSWER: Fog signal blast pattern
for anchored boats.
- -CORRECT ANSWER: From the bow view, a tug boat shows this many white lights if
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having a tow less than 200m astern.
2 minutes -CORRECT ANSWER: Minimum time interval that bearings should be taken
in order to avoid collisions with ships in fog.
20 -CORRECT ANSWER: In North America tidal ranges can get up to this many feet.
- -CORRECT ANSWER: Ideally this many bearings should be taken for an accurate fix.
30-70 -CORRECT ANSWER: Depth in feet that is indicated by kelp beds.
5 -CORRECT ANSWER: Amount of short rapid blasts for danger signal.
5 -CORRECT ANSWER: Number of degrees to steer into the wind for leeway
correction.
5-10 -CORRECT ANSWER: Degree range that the DR course should be plotted
upwind/up-current of the target.
5-20 -CORRECT ANSWER: Number of minutes, in intervals, to stop and listen if
motoring in fog.
6 -CORRECT ANSWER: How many feet in a fathom.
6 -CORRECT ANSWER: Number of feet in a fathom.
6 knots -CORRECT ANSWER: Tidal currents up to this speed can be found on North
American coastlines.
6-8 -CORRECT ANSWER: Number of feet the hand held compass should be away from
the mounted compass when checking for accuracy. 2 / 3
60 -CORRECT ANSWER: 1 degree latitude equals how many minutes?
A -CORRECT ANSWER: Safe water bouts, when lighted, shoe a short/long flashing
white light that is morse code for this letter.
Actual depth at present (heigh of tide at present) -CORRECT ANSWER: The current
distance from surface to datum.
Advance -CORRECT ANSWER: When taking a running bearing this is the term for re-
plotting the first bearing to update it according to distance traveled.
Beacons -CORRECT ANSWER: Lighted daymarks that function as lighted buoys.
Bearing drift -CORRECT ANSWER: Changing bearing reading to the right or left on
another moving object, indicates no collision.
Bearing Line (Line of position) -CORRECT ANSWER: Estimated position (EP) is plotted on this line closest to the DR position.
Bell -CORRECT ANSWER: Audible device activated by waves, always used on the right side of a channel when returning. "Red, right, return, ring"
Bell, gong, whistle, horn -CORRECT ANSWER: 4 common audible navigation aids.
Black/Red -CORRECT ANSWER: What color(s) is an isolated danger buoy?
Boat speed -CORRECT ANSWER: Indicated by knot meter, ignores current.
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