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4-11.
4-12.
4-13.
4-14.
Which of the following aids to
navigation (buoys) are numbered?
1.
Solid red only
2.
Solid green only
3.
4.
Solid red and solid green
Buoys that have letters only
For what purpose are letters used
on buoys?
1.
To indicate the preferred
channel
2.
3.
To indicate midchannel buoys
To indicate the first buoy in a
channel
4.
To augment numbers on lateral
aids
Which of the following buoys are
NOT numbered?
1.
Safe water
2.
Isolated dangers
3.
Special marks
4.
All of the above
What factor(s) contribute(s) to the
visibility of a light?
1.
Intensity only
2.
3.
Height above water only
Color
4.
Intensity and height above
water
IN ANSWERING QUESTIONS 4-15 THROUGH 4-17,
SELECT THE DEFINITION FROM COLUMN B THAT
MATCHES THE TERM IN COLUMN A. NOT ALL
RESPONSES ARE USED.
4-15.
4-16.
4-17.
A. TERM
B. DEFINITION
Meteorological
visibility
1. The visibility
determined for a
Computed
visibility
Horizon
distance
light using the
light's height,
nominal range,
eye of the
observer
2. The maximum
distance a light
may be seen in
perfect weather
3. Results from the
amount of water
vapor present in
the atmosphere
4. The distance
expressed in
nautical miles
from the position
above the Earth
along a line of
sight
IN ANSWERING QUESTIONS 4-18 THROUGH 4-21,
SELECT FROM COLUMN B THE DEFINITION THAT
MATCHES THE TERM IN COLUMN A. RESPONSES
ARE USED ONLY ONCE.
A. TERM
B. DEFINITION
4-18. Luminous
range
4-19. Nominal
range
1. The maximum
distance a
light may be
seen in perfect
visibility
4-20. Geographic
range
2.
4-21. Computed
range
3.
4.
The maximum
distance a light
may be seen in
clear weather
The geographic
range plus the
observer's
distance to the
horizon
The maximum
distance a light
may be seen under
existing weather
conditions
19
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