Celestial Navigation · Time — Chronometer Error
A chronometer reads 14h 12m 30s and is known to be 00m 18s slow on GMT. What is the correct GMT?
- A13h 54m 30s
- B14h 12m 12s
- C14h 30m 30s
- D14h 12m 48s✓ Correct
Explanation
A chronometer that is slow reads less than the true time, so the chronometer error is added: 14h 12m 30s + 18s = 14h 12m 48s GMT. (Fast = subtract; slow = add.)
Authority: Bowditch (Pub. No. 9), chronometer error and rate
Practice the full Celestial Navigation bank
Free spaced-repetition quizzing across 2190 USCG exam questions — it schedules your reviews so the ones you miss come back until they stick.
Related Celestial Navigation questions
- Time
The Nautical Almanac tabulates the positions of celestial bodies against which time standard?
- Time
A vessel in west longitude has a zone description of +5. To convert zone time to UT you must:
- Coordinates
How is the GHA of a star obtained from the Nautical Almanac?
- Coordinates
Sidereal Hour Angle (SHA) is best defined as:
- Coordinates
Declination of a celestial body is the celestial equivalent of:
- The Nautical Almanac
Approximately how fast does the GHA of the Sun increase with time?