NAV 7 DIAGNOSTIC TEST

Front

A coastal chart could have a scale of: 1:100,000, 1:300,000, 1:600,000, 1:15,000

Back

1:100,000

Answer explanation

Coastal Charts is 1:50,000 to 1:150,000

Front

A Mercator chart is?

Back

Cylindrical Projection

Front

The observer is at Equator and the celestial body is at the First Point of Capricorn, the bearing of the celestial body during meridian transit is:

Back

180 degrees

Answer explanation

• The First Point of Capricorn has a declination of approximately 23.5° South.

• The observer is on the Equator, so:

  • If a celestial body has a southerly declination, it will culminate (meridian transit) to the South of the zenith.

  • Hence, at meridian passage, the body is due South of the observer.

Front

Sun’s Position Below Horizon 6° to 12° is called?

Back

Nautical Twilight

Front

The most reliable form of navigational system in the high seas, is?

Back

Celestial Navigation

Front

The horizontal direction of a point on the celestial sphere is called:

Back

Azimuth

Front

Which term refers to the direction a current is flowing? Options: Course, Bearing, Set, Drift

Back

Set

Front

When the moon is new or full, which type of tides occur?

Back

Spring Tide

Front

Under IALA cardinal system, a mark with quick white light showing 3 flashes every 10 seconds indicates that the safest water in the area is on?

Back

East

Front

A GPS satellite transmits a signal through the first carrier on?

Back

1575. 42 MHz

Answer explanation

• GPS satellites transmit signals on multiple radio frequencies, known as L-band frequencies.

• The L1 frequency is the primary signal used by civilian GPS receivers.

L1 1575.42 MHz Civilian GPS (Coarse/Acquisition code – C/A code)

L2 1227.60 MHz Used for military (Precise code – P(Y) code) and dual-frequency receivers

L5 1176.45 MHz New civilian signal (more accurate, better integrity)

L3 1381.05 MHz Used for nuclear detonation detection (not GPS nav)