OUPV Copy Questions: Mastering Magnetic Compass Concepts
– Module 4
In going from magnetic to true, you must _______________________.
Select one:
a. subtract deviation and add variation
b. multiply the easterly deviation by the westerly variation
c. subtract westerly variation or add easterly compass error
d. add easterly variation or subtract westerly variation - correct answer ✔✔D
Deviation is caused by ____________________.
Select one:
a. Nearby magnetic land masses or mineral deposits
b. Magnetic influence inherent to that particular vessel
c. Changes in the earth's magnetic field
d. The magnetic lines of force not coinciding with the lines of longitude - correct answer ✔✔B
If a magnetic compass is not affected by any magnetic field other than the earth's, which statement is
true?
Select one:
a. Compass north will be true north
b. Variation will equal deviation
c. There will be no compass error
d. Compass error and variation are equal - correct answer ✔✔D
Magnetic heading differs from compass heading by ________________.
Select one:
a. Compass error
b. Variation
, c. Deviation
d. True Heading - correct answer ✔✔C
In applying variation to a true course to obtain a magnetic course ___________________.
Select one:
a. you should subtract east and add west
b. you should add east and add west
c. you should subtract east and subtract west
d. you should add north and subtract south - correct answer ✔✔A
The lubber's line on a magnetic compass indicates__________.
Select one:
a. the direction in which the boat's bow is heading
b. a relative bearing taken with an azimuth circle
c. compass north
d. magnetic north - correct answer ✔✔A
If the magnetic heading is greater than the compass heading, the deviation is __________________. -
correct answer ✔✔East
As a vessel changes course to starboard, the compass card in a magnetic compass ____________.
Select one:
a. remains aligned with compass north
b. also turns to starboard
c. first turns to starboard then counterclockwise to port
d. turns counterclockwise to port - correct answer ✔✔A
Compass error is equal to the ___________________.
Select one:
– Module 4
In going from magnetic to true, you must _______________________.
Select one:
a. subtract deviation and add variation
b. multiply the easterly deviation by the westerly variation
c. subtract westerly variation or add easterly compass error
d. add easterly variation or subtract westerly variation - correct answer ✔✔D
Deviation is caused by ____________________.
Select one:
a. Nearby magnetic land masses or mineral deposits
b. Magnetic influence inherent to that particular vessel
c. Changes in the earth's magnetic field
d. The magnetic lines of force not coinciding with the lines of longitude - correct answer ✔✔B
If a magnetic compass is not affected by any magnetic field other than the earth's, which statement is
true?
Select one:
a. Compass north will be true north
b. Variation will equal deviation
c. There will be no compass error
d. Compass error and variation are equal - correct answer ✔✔D
Magnetic heading differs from compass heading by ________________.
Select one:
a. Compass error
b. Variation
, c. Deviation
d. True Heading - correct answer ✔✔C
In applying variation to a true course to obtain a magnetic course ___________________.
Select one:
a. you should subtract east and add west
b. you should add east and add west
c. you should subtract east and subtract west
d. you should add north and subtract south - correct answer ✔✔A
The lubber's line on a magnetic compass indicates__________.
Select one:
a. the direction in which the boat's bow is heading
b. a relative bearing taken with an azimuth circle
c. compass north
d. magnetic north - correct answer ✔✔A
If the magnetic heading is greater than the compass heading, the deviation is __________________. -
correct answer ✔✔East
As a vessel changes course to starboard, the compass card in a magnetic compass ____________.
Select one:
a. remains aligned with compass north
b. also turns to starboard
c. first turns to starboard then counterclockwise to port
d. turns counterclockwise to port - correct answer ✔✔A
Compass error is equal to the ___________________.
Select one:
