ASA 105 Exam Questions and Answers 100% Correct
General charts Ans-Chart of the coast that shows little detail. Also known as a "small scale"
chart. Typical scale 1:600,000
Coastal chart Ans-Show a subsection of the coast line in enough detail to permit navigation
along the coast and i to large harbors. Typical scale 1:60,000
Harbor charts Ans-Very detailed charts specific to a harbor. Useful for piloting through a
harbor entrance. Typical scale 1:2,500
Small craft charts Ans-Special classes of charts that cover the intracoastal waterways (gulf
and atlantic)
Three primary measurements for finding position on a chart Ans-Direction, distance and
speed
Course Ans-Direction you steer as indicated on the compass
Bearing Ans-Direction of a charted landmark as seen from your boat and measured by the
boat's compass
Name 4 typical errors made in plotting distance on a chart Ans-Slipping parallel rules, mixing
true and magnetic directions on the compass rose, misreading the compass, misreading the
mileage scale
What are the two definitions of "returning" Ans-1) entering a harbor from the sea/larger
body of water 2) on the ICW returning is traveling south and west (atlantic and gulf)
, What happens when the ICW shares and entrance to a bay/harbor Ans-The OCW markers
will show either a yellow triangle, or square. The square is left to port when returning
Are red buoys odd, or even numbered? Ans-Even
Why should you look behind you as well as ahead of you when in a channel? Ans-To make
sure you are not being set out of the channel by the current
What shape are red day marks? Ans-Triangle
What shape are green day marks? Ans-Square
How should you correct course when using transit lights and the lower light is off to one side?
Ans-Steer towards the lower light
What is the term used to describe the system of using buoys to mark the sides of channels
Ans-Lateral system of buoyage
Yellow buoys may be used to mark Ans-Shipping lanes, fish net grounds, ship anchorage
areas, military exercise zones
What do white lights indicate? Ans-Channel center
What is an occulting light Ans-Long light symbols like a morse code dash
What is a flashing light symbol? Ans-Short flashes like the dot in more code
General charts Ans-Chart of the coast that shows little detail. Also known as a "small scale"
chart. Typical scale 1:600,000
Coastal chart Ans-Show a subsection of the coast line in enough detail to permit navigation
along the coast and i to large harbors. Typical scale 1:60,000
Harbor charts Ans-Very detailed charts specific to a harbor. Useful for piloting through a
harbor entrance. Typical scale 1:2,500
Small craft charts Ans-Special classes of charts that cover the intracoastal waterways (gulf
and atlantic)
Three primary measurements for finding position on a chart Ans-Direction, distance and
speed
Course Ans-Direction you steer as indicated on the compass
Bearing Ans-Direction of a charted landmark as seen from your boat and measured by the
boat's compass
Name 4 typical errors made in plotting distance on a chart Ans-Slipping parallel rules, mixing
true and magnetic directions on the compass rose, misreading the compass, misreading the
mileage scale
What are the two definitions of "returning" Ans-1) entering a harbor from the sea/larger
body of water 2) on the ICW returning is traveling south and west (atlantic and gulf)
, What happens when the ICW shares and entrance to a bay/harbor Ans-The OCW markers
will show either a yellow triangle, or square. The square is left to port when returning
Are red buoys odd, or even numbered? Ans-Even
Why should you look behind you as well as ahead of you when in a channel? Ans-To make
sure you are not being set out of the channel by the current
What shape are red day marks? Ans-Triangle
What shape are green day marks? Ans-Square
How should you correct course when using transit lights and the lower light is off to one side?
Ans-Steer towards the lower light
What is the term used to describe the system of using buoys to mark the sides of channels
Ans-Lateral system of buoyage
Yellow buoys may be used to mark Ans-Shipping lanes, fish net grounds, ship anchorage
areas, military exercise zones
What do white lights indicate? Ans-Channel center
What is an occulting light Ans-Long light symbols like a morse code dash
What is a flashing light symbol? Ans-Short flashes like the dot in more code
