Bridge Navigation & Deck Operations

Celestial Navigation – Deck Officer Assessment

Comprehensive celestial navigation test based on practical officer-level tasks. Includes latitude by meridian altitude, GHA/LHA/SHA calculations, intercept method, azimuth & position lines, equation of time, and sextant errors. Recommended for 2/O, 3/O and exam preparation.

Questions 18

Time Limit 9 min

Language English

Sample Questions

Here are some example questions from this quiz. Download the GYRO app to take the full test.

Question 1

Sidereal hour angle is defined as the angular distance of an hour circle:

A Zenith.

B Celestrial meridian.

C Equator.

D Ecliptic plane.

Question 2

The magnitude of a star is a measure of its:

A distance from Earth.

B less brightness.

C brightness and luminous stars.

D color.

Question 3

Given that the True Zenith Distance is 17° 44.0′ and that the Calculated Zenith Distance is 17° 46.0′, find and name the intercept, with respect to the direction of the observed.

A -2′.

B +2′.

C +1′.

D -1′.

Question 4

The moon rotates around its axis with a period of:

A 28,0 days.

B Star month 27,3 days, moon month 29,5 days.

C 30,0 days.

D 26,5 days.

Question 5

Given that the true altitude is 61° 47.9′ calculate the True Zenith Distance.

A 30° 15.5′.

B 28° 12.1′.

C 25° 30.0′.

D 32° 45.3′.

Celestial Navigation – Deck Officer Assessment

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