ASA 105 Costal Navigation Exam Questions and Answers Already Passed
Equator - AnswersBaseline for latitude at 0 degrees.
Prime Meridian (Greenwich) - AnswersBaseline for longitude at 0 degrees.
Parallels - AnswersAlternate name for latitude.
North Pole - Answers90 degrees north latitude.
South Pole - Answers90 degrees south latitude.
60 - Answers1 degree latitude equals how many minutes?
1 Nautical Mile - AnswersEqual to 1 minute latitude.
Meridians - AnswersAlternate name for longitude lines.
International Date Line - Answers180 degrees longitude.
Degrees, Minutes, tenths of minutes - AnswersLongitude is measure in these three increments.
Distance - AnswersLongitude is never used to measure this.
Mercator Projection - AnswersUsed to make flat charts for direction measurements.
Small Scale - AnswersUsed to map large areas.
Large scale - AnswersUsed to map small areas.
Harbor, Coastal - AnswersTwo types of charts that use large scale.
General, Sailing - AnswersTwo types of charts that use small scale
Navigation - AnswersAnswers the questions: Where am I? How to I get to my destination safely?
Direction, speed, distance - AnswersThree primary nautical measurements.
Speed - AnswersMust be derived, calculated, or read.
Distance - AnswersMeasured in nautical miles.
Direction - AnswersMeasured in relation to north.
Magnetic - AnswersInner degree circle on the compass rose.
Geographic (True) - AnswersOuter degree circle on the compass rose.
Variation - AnswersDifference between geographic and magnetic north.
, Red, right, return - AnswersBasic rule for piloting your boat into any US harbor.
Intercostal waterway (ICW) - AnswersWhen traveling here "returning" is considered traveling south and
west along the Atlantic and gulf coasts.
Color, shape, number - AnswersThree elements used in the buoy or marker system.
Red - AnswersColor of markers that are shaped like cones or triangles with even numbers.
Green - AnswersColor of markers that are cylindrical or square with odd numbers.
Preferred Channel (or Obstruction) - AnswersBuoys or markers that may be cylindrical, square, or cone
shaped with letters. The preferred color is on top.
Safe Water (mid channel) - AnswersRed/White vertically stripped buoys/markers that show fairways,
mid channels, and approach points.
A - AnswersSafe water bouts, when lighted, shoe a short/long flashing white light that is morse code for
this letter.
Special Purpose - AnswersBuoys that have many uses (ex: Dredging, fish traps, military, etc...)
Black/Red - AnswersWhat color(s) is an isolated danger buoy?
Square - AnswersShape on ICW sign to be on your left (Port) when "returning".
Triangle - AnswersShape on ICW sign to be on right (starboard) when "returning".
Transit Lights (Range Lights) - AnswersTwo beacons on shore or shallow water that line up at the center
of a channel, back light is higher than the front.
Color, timing - AnswersTwo features that identify buoys/beacons at night.
Red, green, white - AnswersThree colors of lights commonly used on buoys.
Flashing - AnswersLight pattern characterized by repeatedly turning on and off in approx 5 second
intervals.
Occulting - AnswersLight pattern characterized by turning on for 2-3 seconds and then off for 1.
Quick Flashing - AnswersLight pattern characterized by rapid turning on and off.
Composite group (junction) - AnswersLight pattern that flashed twice, pauses 5 seconds, then flashes
once.
Short Long - AnswersLight pattern that flashes one short and one long flash.
Bell, gong, whistle, horn - Answers4 common audible navigation aids.
Equator - AnswersBaseline for latitude at 0 degrees.
Prime Meridian (Greenwich) - AnswersBaseline for longitude at 0 degrees.
Parallels - AnswersAlternate name for latitude.
North Pole - Answers90 degrees north latitude.
South Pole - Answers90 degrees south latitude.
60 - Answers1 degree latitude equals how many minutes?
1 Nautical Mile - AnswersEqual to 1 minute latitude.
Meridians - AnswersAlternate name for longitude lines.
International Date Line - Answers180 degrees longitude.
Degrees, Minutes, tenths of minutes - AnswersLongitude is measure in these three increments.
Distance - AnswersLongitude is never used to measure this.
Mercator Projection - AnswersUsed to make flat charts for direction measurements.
Small Scale - AnswersUsed to map large areas.
Large scale - AnswersUsed to map small areas.
Harbor, Coastal - AnswersTwo types of charts that use large scale.
General, Sailing - AnswersTwo types of charts that use small scale
Navigation - AnswersAnswers the questions: Where am I? How to I get to my destination safely?
Direction, speed, distance - AnswersThree primary nautical measurements.
Speed - AnswersMust be derived, calculated, or read.
Distance - AnswersMeasured in nautical miles.
Direction - AnswersMeasured in relation to north.
Magnetic - AnswersInner degree circle on the compass rose.
Geographic (True) - AnswersOuter degree circle on the compass rose.
Variation - AnswersDifference between geographic and magnetic north.
, Red, right, return - AnswersBasic rule for piloting your boat into any US harbor.
Intercostal waterway (ICW) - AnswersWhen traveling here "returning" is considered traveling south and
west along the Atlantic and gulf coasts.
Color, shape, number - AnswersThree elements used in the buoy or marker system.
Red - AnswersColor of markers that are shaped like cones or triangles with even numbers.
Green - AnswersColor of markers that are cylindrical or square with odd numbers.
Preferred Channel (or Obstruction) - AnswersBuoys or markers that may be cylindrical, square, or cone
shaped with letters. The preferred color is on top.
Safe Water (mid channel) - AnswersRed/White vertically stripped buoys/markers that show fairways,
mid channels, and approach points.
A - AnswersSafe water bouts, when lighted, shoe a short/long flashing white light that is morse code for
this letter.
Special Purpose - AnswersBuoys that have many uses (ex: Dredging, fish traps, military, etc...)
Black/Red - AnswersWhat color(s) is an isolated danger buoy?
Square - AnswersShape on ICW sign to be on your left (Port) when "returning".
Triangle - AnswersShape on ICW sign to be on right (starboard) when "returning".
Transit Lights (Range Lights) - AnswersTwo beacons on shore or shallow water that line up at the center
of a channel, back light is higher than the front.
Color, timing - AnswersTwo features that identify buoys/beacons at night.
Red, green, white - AnswersThree colors of lights commonly used on buoys.
Flashing - AnswersLight pattern characterized by repeatedly turning on and off in approx 5 second
intervals.
Occulting - AnswersLight pattern characterized by turning on for 2-3 seconds and then off for 1.
Quick Flashing - AnswersLight pattern characterized by rapid turning on and off.
Composite group (junction) - AnswersLight pattern that flashed twice, pauses 5 seconds, then flashes
once.
Short Long - AnswersLight pattern that flashes one short and one long flash.
Bell, gong, whistle, horn - Answers4 common audible navigation aids.
