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2-27.
If a ship has two magnetic
compasses, what is the second
compass called?
1.
Back-up compass
2.
Standard compass
3.
Checking compass
4. Auxiliary compass
2-28.
The notation "PSC" after courses
and bearings indicates the readings
were obtained using which of the
following compasses?
1.
Steering
2.
Standard
3.
Selsyn
4.
Synchronized
2-29.
Which of the following precautions
must be observed in the vicinity of
a magnetic compass?
1.
A compass should not be placed
near iron or steel equipment
that will be frequently moved
2.
The immediate vicinity should
be kept free of sources of
magnetism, particularly those
of a changing nature
3. No source of magnetism should
be permitted within a radius of
several feet
4. All of the above
IN ANSWERING QUESTIONS 2-30 THROUGH 2-33,
SELECT FROM COLUMN B THE DEFINITION THAT
MATCHES THE COMPASS BINNACLE COMPONENT IN
COLUMN A. RESPONSES ARE USED ONLY ONCE.
A. COMPONENT B. DEFINITION
2-30.
2-31.
2-32.
2-33.
Card
Magnets
Gimbals
1.
2.
Binnacle
3.
4.
Serves to house
the compass
Several bars are
used to correct
and align the
compass
Has a jeweled
bearing that
rides on a pivot
point
Permits the
compass to remain
level
2-34.
2-35.
2-36.
2-37.
2-38.
2-39.
2-40.
What are the two influences that
must be taken into account when
compass error is determined?
1.
Variation and deviation
2.
Gyro error and variation
3.
Annual change and variation
4.
Gyro error and deviation
The amount a compass is deflected
from the magnetic meridian because
of the effects of the ship's iron
defines which of the following
terms?
1.
Deviation
2.
Degradation
3. Declination
4.
Depreciation
The amount of deviation varies as
the ship changes course.
1.
True
2.
False
What is the process of correcting
for deviation called?
1. Adjusting the compass
2. Swinging ship
3.
Swinging the compass
4.
Compensating the compass
Refer to figure 2-8 in the text.
The magnetic compass deviation
table shows the "ships head
magnetic" in increments of how many
degrees?
1.
5°
2.
10°
3.
15°
4.
20°
What does the bottom of the
magnetic compass table indicate?
1.
The date and ship's position
2. Magnet placements only
3. Flinders bar placements only
4.
Magnet and flinders bar
placements
Refer to figure 2-8 in your text.
If the magnetic course is 150°
(DG OFF), what is the approximate
compass course?
1.
146°
2.
147°
3.
148°
4.
152°
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