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IN ANSWERING QUESTIONS 4-30 THROUGH 4-33,
SELECT FROM COLUMN B THE FUNCTION THAT
MATCHES THE LIGHT IN COLUMN A. RESPONSES
ARE USED ONLY ONCE.
A. LIGHT
B. FUNCTION
4-30. Light towers
1.
4-31. Daybeacons
4-32. Ranges
2.
4-33. Directional
lights
3.
4.
Marks the
centerline of a
channel
Replaced
lightships
Displays a very
narrow angle
light beam for a
ship to follow
Used as unlighted
navigation aids
4-34.
A navigator knows that he is "on
the range" when the lights or
beacons of the range are observed
in what position?
4-35.
4-36.
4-37.
4-38.
1.
One over the other
2.
At a 45° angle
3.
At a 90° angle
4.
At a 180° angle
Daymarks marking the sides of a
channel are colored and numbered in
the same manner as buoys.
1.
True
2.
False
Minor lights are structured like
daybeacons, but are equipped with
lights generally found on buoys.
1.
True
2.
False
Which of the following colors is
NOT used for navigation lights?
1. White
2.
Red
3.
Yellow
4.
Green
What light color abbreviation does
NOT appear on a chart and is
assumed?
1.
Blue
2.
Yellow
3. Green
4.
White
4-39.
Alternating lights are reserved for
which of the following special
applications?
1.
Lighthouses
2.
Airport beacons
3.
Harbor entrance lights
4.
Each of the above
4-40.
What is indicated by the red
sectors placed in the lanterns of
some lighthouses?
1.
Danger bearings
2.
Recommended approaches
3. Restricted areas
4.
Safety sectors
4-41.
What does a narrow green sector in
a navigational light indicate?
1. A range
2.
A radio beacon
3.
Water that should be avoided
4.
The best water across a shoal
4-42.
All sector bearings are true
bearings expressed as bearings
observed from the ship towards the
light.
1.
True
2.
False
4-43.
Atmospheric conditions may cause a
white light to appear what color?
1. Yellow
2. Amber
3.
Orange
4. Reddish
4-44.
Emergency lights may or may not
have the same characteristics as
the main light.
1.
True
2.
False
4-45.
A RACON is a radar beacon that
produces which of the following
outputs?
1.
Coded response when swept by a
radio signal
2. Radar paint when triggered by a
radio signal
3.
Coded signal when swept by
light
4.
Radar paint when triggered by a
radar signal
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