ASA 105 Costal Navigation Exam Graded A+
1 foot - ANSWER-A one inch drop in barometric pressure will rise the tide approximately
this many feet.
1 Hour - ANSWER-Traditional amount of time between plotting DR position.
1 Nautical Mile - ANSWER-Equal to 1 minute latitude.
1 prolonged (every two minutes) - ANSWER-Fog signal blast pattern for motoring boats.
1 prolonged, 2 short (every 2 minutes) - ANSWER-Fog signal blast pattern for a sail
boat.
1 short, 1 long, 1 short (every minute) - ANSWER-Fog signal blast pattern for anchored
boats.
2 - ANSWER-From the bow view, a tug boat shows this many white lights if having a
tow less than 200m astern.
2 minutes - ANSWER-Minimum time interval that bearings should be taken in order to
avoid collisions with ships in fog.
20 - ANSWER-In North America tidal ranges can get up to this many feet.
3 - ANSWER-Ideally this many bearings should be taken for an accurate fix.
30-70 - ANSWER-Depth in feet that is indicated by kelp beds.
5 - ANSWER-Amount of short rapid blasts for danger signal.
5 - ANSWER-Number of degrees to steer into the wind for leeway correction.
5-10 - ANSWER-Degree range that the DR course should be plotted upwind/up-current
of the target.
5-20 - ANSWER-Number of minutes, in intervals, to stop and listen if motoring in fog.
6 - ANSWER-How many feet in a fathom.
6 - ANSWER-Number of feet in a fathom.
6 knots - ANSWER-Tidal currents up to this speed can be found on North American
coastlines.
, 6-8 - ANSWER-Number of feet the hand held compass should be away from the
mounted compass when checking for accuracy.
60 - ANSWER-1 degree latitude equals how many minutes?
A - 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) - ANSWER-The current distance from
surface to datum.
Advance - ANSWER-When taking a running bearing this is the term for re-plotting the
first bearing to update it according to distance traveled.
Beacons - ANSWER-Lighted daymarks that function as lighted buoys.
Bearing drift - ANSWER-Changing bearing reading to the right or left on another moving
object, indicates no collision.
Bearing Line (Line of position) - ANSWER-Estimated position (EP) is plotted on this line
closest to the DR position.
Bell - 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 - ANSWER-4 common audible navigation aids.
Black/Red - ANSWER-What color(s) is an isolated danger buoy?
Boat speed - ANSWER-Indicated by knot meter, ignores current.
Buoy lights - ANSWER-Typically low powered and visible for only 1-4 miles based on
conditions.
Buoys - ANSWER-Plot courses between these during fog to help check your position.
C 090 M / S5.0 (D=10) - ANSWER-Correct way to label DR plot with these variables:
speed 5 knots, distance 10 nautical miles, degrees on magnetic compass 90.
Charted landmarks - ANSWER-The most useful and accurate objects to take bearings
on when plotting position.
Color, shape, number - ANSWER-Three elements used in the buoy or marker system.
Color, timing - ANSWER-Two features that identify buoys/beacons at night.
1 foot - ANSWER-A one inch drop in barometric pressure will rise the tide approximately
this many feet.
1 Hour - ANSWER-Traditional amount of time between plotting DR position.
1 Nautical Mile - ANSWER-Equal to 1 minute latitude.
1 prolonged (every two minutes) - ANSWER-Fog signal blast pattern for motoring boats.
1 prolonged, 2 short (every 2 minutes) - ANSWER-Fog signal blast pattern for a sail
boat.
1 short, 1 long, 1 short (every minute) - ANSWER-Fog signal blast pattern for anchored
boats.
2 - ANSWER-From the bow view, a tug boat shows this many white lights if having a
tow less than 200m astern.
2 minutes - ANSWER-Minimum time interval that bearings should be taken in order to
avoid collisions with ships in fog.
20 - ANSWER-In North America tidal ranges can get up to this many feet.
3 - ANSWER-Ideally this many bearings should be taken for an accurate fix.
30-70 - ANSWER-Depth in feet that is indicated by kelp beds.
5 - ANSWER-Amount of short rapid blasts for danger signal.
5 - ANSWER-Number of degrees to steer into the wind for leeway correction.
5-10 - ANSWER-Degree range that the DR course should be plotted upwind/up-current
of the target.
5-20 - ANSWER-Number of minutes, in intervals, to stop and listen if motoring in fog.
6 - ANSWER-How many feet in a fathom.
6 - ANSWER-Number of feet in a fathom.
6 knots - ANSWER-Tidal currents up to this speed can be found on North American
coastlines.
, 6-8 - ANSWER-Number of feet the hand held compass should be away from the
mounted compass when checking for accuracy.
60 - ANSWER-1 degree latitude equals how many minutes?
A - 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) - ANSWER-The current distance from
surface to datum.
Advance - ANSWER-When taking a running bearing this is the term for re-plotting the
first bearing to update it according to distance traveled.
Beacons - ANSWER-Lighted daymarks that function as lighted buoys.
Bearing drift - ANSWER-Changing bearing reading to the right or left on another moving
object, indicates no collision.
Bearing Line (Line of position) - ANSWER-Estimated position (EP) is plotted on this line
closest to the DR position.
Bell - 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 - ANSWER-4 common audible navigation aids.
Black/Red - ANSWER-What color(s) is an isolated danger buoy?
Boat speed - ANSWER-Indicated by knot meter, ignores current.
Buoy lights - ANSWER-Typically low powered and visible for only 1-4 miles based on
conditions.
Buoys - ANSWER-Plot courses between these during fog to help check your position.
C 090 M / S5.0 (D=10) - ANSWER-Correct way to label DR plot with these variables:
speed 5 knots, distance 10 nautical miles, degrees on magnetic compass 90.
Charted landmarks - ANSWER-The most useful and accurate objects to take bearings
on when plotting position.
Color, shape, number - ANSWER-Three elements used in the buoy or marker system.
Color, timing - ANSWER-Two features that identify buoys/beacons at night.
