ASA 105 Costal Navigation Exam
Questions with Correct Answers
Equator - Answer-Baseline for latitude at 0 degrees.
Prime Meridian (Greenwich) - Answer-Baseline for longitude at 0 degrees.
Parallels - Answer-Alternate name for latitude.
North Pole - Answer-90 degrees north latitude.
South Pole - Answer-90 degrees south latitude.
60 - Answer-1 degree latitude equals how many minutes?
1 Nautical Mile - Answer-Equal to 1 minute latitude.
Meridians - Answer-Alternate name for longitude lines.
International Date Line - Answer-180 degrees longitude.
Degrees, Minutes, tenths of minutes - Answer-Longitude is measure in these three
increments.
Distance - Answer-Longitude is never used to measure this.
Mercator Projection - Answer-Used to make flat charts for direction measurements.
Small Scale - Answer-Used to map large areas.
Large scale - Answer-Used to map small areas.
Harbor, Coastal - Answer-Two types of charts that use large scale.
General, Sailing - Answer-Two types of charts that use small scale
Navigation - Answer-Answers the questions: Where am I? How to I get to my
destination safely?
Direction, speed, distance - Answer-Three primary nautical measurements.
Speed - Answer-Must be derived, calculated, or read.
Distance - Answer-Measured in nautical miles.
, Direction - Answer-Measured in relation to north.
Magnetic - Answer-Inner degree circle on the compass rose.
Geographic (True) - Answer-Outer degree circle on the compass rose.
Variation - Answer-Difference between geographic and magnetic north.
Red, right, return - Answer-Basic rule for piloting your boat into any US harbor.
Intercostal waterway (ICW) - Answer-When traveling here "returning" is considered
traveling south and west along the Atlantic and gulf coasts.
Color, shape, number - Answer-Three elements used in the buoy or marker system.
Red - Answer-Color of markers that are shaped like cones or triangles with even
numbers.
Green - Answer-Color of markers that are cylindrical or square with odd numbers.
Preferred Channel (or Obstruction) - Answer-Buoys or markers that may be cylindrical,
square, or cone shaped with letters. The preferred color is on top.
Safe Water (mid channel) - Answer-Red/White vertically stripped buoys/markers that
show fairways, mid channels, and approach points.
A - Answer-Safe water bouts, when lighted, shoe a short/long flashing white light that is
morse code for this letter.
Special Purpose - Answer-Buoys that have many uses (ex: Dredging, fish traps,
military, etc...)
Black/Red - Answer-What color(s) is an isolated danger buoy?
Square - Answer-Shape on ICW sign to be on your left (Port) when "returning".
Triangle - Answer-Shape on ICW sign to be on right (starboard) when "returning".
Transit Lights (Range Lights) - Answer-Two beacons on shore or shallow water that line
up at the center of a channel, back light is higher than the front.
Color, timing - Answer-Two features that identify buoys/beacons at night.
Red, green, white - Answer-Three colors of lights commonly used on buoys.
Questions with Correct Answers
Equator - Answer-Baseline for latitude at 0 degrees.
Prime Meridian (Greenwich) - Answer-Baseline for longitude at 0 degrees.
Parallels - Answer-Alternate name for latitude.
North Pole - Answer-90 degrees north latitude.
South Pole - Answer-90 degrees south latitude.
60 - Answer-1 degree latitude equals how many minutes?
1 Nautical Mile - Answer-Equal to 1 minute latitude.
Meridians - Answer-Alternate name for longitude lines.
International Date Line - Answer-180 degrees longitude.
Degrees, Minutes, tenths of minutes - Answer-Longitude is measure in these three
increments.
Distance - Answer-Longitude is never used to measure this.
Mercator Projection - Answer-Used to make flat charts for direction measurements.
Small Scale - Answer-Used to map large areas.
Large scale - Answer-Used to map small areas.
Harbor, Coastal - Answer-Two types of charts that use large scale.
General, Sailing - Answer-Two types of charts that use small scale
Navigation - Answer-Answers the questions: Where am I? How to I get to my
destination safely?
Direction, speed, distance - Answer-Three primary nautical measurements.
Speed - Answer-Must be derived, calculated, or read.
Distance - Answer-Measured in nautical miles.
, Direction - Answer-Measured in relation to north.
Magnetic - Answer-Inner degree circle on the compass rose.
Geographic (True) - Answer-Outer degree circle on the compass rose.
Variation - Answer-Difference between geographic and magnetic north.
Red, right, return - Answer-Basic rule for piloting your boat into any US harbor.
Intercostal waterway (ICW) - Answer-When traveling here "returning" is considered
traveling south and west along the Atlantic and gulf coasts.
Color, shape, number - Answer-Three elements used in the buoy or marker system.
Red - Answer-Color of markers that are shaped like cones or triangles with even
numbers.
Green - Answer-Color of markers that are cylindrical or square with odd numbers.
Preferred Channel (or Obstruction) - Answer-Buoys or markers that may be cylindrical,
square, or cone shaped with letters. The preferred color is on top.
Safe Water (mid channel) - Answer-Red/White vertically stripped buoys/markers that
show fairways, mid channels, and approach points.
A - Answer-Safe water bouts, when lighted, shoe a short/long flashing white light that is
morse code for this letter.
Special Purpose - Answer-Buoys that have many uses (ex: Dredging, fish traps,
military, etc...)
Black/Red - Answer-What color(s) is an isolated danger buoy?
Square - Answer-Shape on ICW sign to be on your left (Port) when "returning".
Triangle - Answer-Shape on ICW sign to be on right (starboard) when "returning".
Transit Lights (Range Lights) - Answer-Two beacons on shore or shallow water that line
up at the center of a channel, back light is higher than the front.
Color, timing - Answer-Two features that identify buoys/beacons at night.
Red, green, white - Answer-Three colors of lights commonly used on buoys.
