Variation, Deviation & COMPASS ERROR

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Variation is a COMPASS ERROR that

CANNOT BE CORRECTED

The TOTAL MAGNETIC EFFECTS cause DEVIATION of a VESSEL'S COMPASS can be BROKEN down into a SERIES of COMPONENTS which are

COEFFICIENTS

COMPASS ERROR is EQUAL to

COMBINED EFFECT of VARIATION and DEVIATION

COMPASS HEADING of a VESSEL DIFFERS from the TRUE HEADING BY

COMPASS ERROR

The STANDARD MAGNETIC COMPASS Heading differs from the TRUE HEADING by

COMPASS ERROR

IF a magnetic compass is not affected by any magnetic field other than the Earth's which is true?

COMPASS ERROR and VARIATION are EQUAL

If a ship is proceeding TOWARDS the MAGNETIC EQUATOR, the UNCORRECTED DEVIATION due to PERMANENT MAGNETISM

DECREASE

MAGNETIC HEADING DIFFERS from COMPASS HEADING by

DEVIATION

THE ERROR in a MAGNETIC COMPASS caused by the vessel's magnetism is called

DEVIATION

The HORIZONTAL ANGLE between the MAGNETIC MERIDIAN and the NORTH-SOTUH line of the MAGNETIC COMPASS is

DEVIATION

the DIFFERENCE between MAGNETIC HEADING and COMPASS HEADING is

DEVIATION

If the MAGNETIC HEADING is GREATER than the COMPASS HEADING, the DEVIATION is

EAST

COMPASS ERROR of a magnetic compass that has NO DEVIATION is

EQUAL to VARIATION

Variation is NOT CONSTANT; it is DIFFERENT with every CHANGE in

GEOGRAPHICAL LOCATION

COMPASS DEVIATION changes as the VESSEL CHANGES

HEADING

DEVIATION CHANGES with a CHANGE in

HEADING

DEVIATION in a COMPASS is caused by the

INFLUENCE of the MAGNETIC MATERIALS of the VESSEL

DEVIATION is caused by

MAGNETIC INFLUENCE INHERENT to that PARTICULAR VESSEL

DEVIATION is the ANGLE BETWEEN

MAGNETIC MERIDIAN and AXIS of COMPASS CARD

Variation is the angular measurement between

MAGNETIC and GEOGRAPHIC MERIDIAN

COMPASS DEVIATION is caused by

MAGNETISM WITHIN THE VESSEL

VARIATION IN A COMPASS IS CAUSED BY

MAGNETISM from the EARTH'S MAGNETIC FIELD

a vessel heading NNE is on a course of

022.5 degrees

a vessel heading ENE is on a course of

067.5 degrees

One Point of a compass is equal to how many degrees?

11.25 degrees

a vessel heading ESE is on a course of

112.5 degrees

a vessel heading SE is on a course of

135 degrees

a vessel heading SSE is on a course of

157.5 degrees

a vessel heading SSW is on a course of

202.5 degrees

a vessel heading SW is on course of

225.0 degrees

a vessel heading WSW is on a course of

247.5 degrees

a vessel heading WNW is on a course of

292.5 degrees

the chart indicates the variation was 3 degrees 45 minutes W in 1988, and the annual change is DECREASING 6'. If you use the chart in 1991 how much variation should you apply?

3 degrees 27 minutes West

a vessel heading NW is on a course of

315 degrees

How many points are there in a compass card?

32

a vessel heading NNW is on a course of

337.5 degrees

How many DEGREES are there on a COMPASS CARD?

360 degrees

a MAGNETIC COURSE CARD is marked in how many degrees?

360 degrees

the chart indicates the variation was 3 degrees 45 minutes E in 1988, and the annual change is INCREASING 6'. If you use the chart in 1991 how much variation should you apply?

4 degrees 03 minutes East

the chart indicates the variation was 3 degrees 45 minutes W in 1988, and the annual change is INCREASING 6'. If you use the chart in 1991 how much variation should you apply?

4 degrees 03 minutes West

a vessel heading NE is on a course of

45.0 degrees

eight points of the compass are equal to how many degrees?

90

MAGNETIC COMPASS DEVIATION is

ANGULAR DIFFERENCE BETWEEN MAGNETIC NORTH and COMPASS NORTH

The COMPASS ROSE on a NAUTICAL CHART INDICATES both VARIATION and ______

ANNUAL RATE of VARIATION CHANGE

TRUE HEADING differs from MAGNETIC HEADING by

VARIATION

The DIFFERENCE in DEGREES between TRUE NORTH and MAGNETIC NORTH is

VARIATION

The magnetic compass error which CHANGES with GEOGRAPHICAL LOCATION of YOUR VESSEL is

VARIATION

To find a MAGNETIC COURSE from a TRUE COURSE you must apply

VARIATION

when changing form a COMPASS COURSE to A TRUE COURSE you should apply

Variation and deviation

To find a magnetic compass course from a true course you must apply

deviation and variation

to find a magnetic compass course from a true course you must apply

deviation and variation

If the COMPASS HEADING and the MAGNETIC HEADING are the same then

there is no deviation on that heading

MAGNETIC VARIATION changes with a change

vessel's position


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