A strobe light may be used to
attract the attention of another
vessel in international waters.
Which of the following is NOT a
distress signal used by the U.S.
1. The ensign flown upside down
2. Flames on a deck
3. A rocket parachute flare
4. A continuous sounding with any
When a submarine is in an emergency
situation and is coming to
periscope depth, what color smoke
flare should the submarine fire?
1. White only
2. Yellow only
3. White or yellow
When a submarine is in serious
trouble, what color smoke flare
should the submarine fire?
IN ANSWERING QUESTIONS 5-54 THROUGH 5-56,
SELECT THE REFERENCE POINT FROM COLUMN B
THAT IS USED TO CALCULATE THE TIME LISTED
IN COLUMN A. NOT ALL RESPONSES ARE USED.
B. REFERENCE POINT
5-54. Mean solar
1. 24 hours
5-55. Solar day
2. Fictional sun
5-56. Solar apparent
3. First point of
Mean solar time and apparent solar
time are nearly equal, but apparent
solar time is the time used in
The "equation of time" is the name
given to the difference between
what two types of time?
Mean time and zone time
Apparent time and mean time
Apparent time and zone time
Zone time and Greenwich mean
IN ANSWERING QUESTIONS 5-59 THROUGH 5-62,
SELECT FROM COLUMN B THE DEFINITION THAT
MATCHES THE TYPE OF TIME IN COLUMN A.
RESPONSES ARE USED ONLY ONCE.
A. TYPE OF TIME
The time at the
The adjustment to
be applied to
Time based on
Mean solar time
with reference to
What kind of time is usually
indicated by a ship's clock?
Over which meridian, in relation to
your position, is the Sun located
when local apparent time is 180°?
90° to the west
180° to the west
90° to the east
180° to the east
How many degrees does a time zone
extend on either side of the
standard time meridian?
What time is it when the Sun is on
the Greenwich meridian (0°)?
1. Noon GMT
2. Noon LMT
3. Noon ZT
4. Each of the above