Celestial Navigation · The Day's Work
A traditional celestial 'day's work' at sea is built around which sequence of observations?
- AContinuous Sun sights taken only at midnight
- BA single Polaris sight that fixes the vessel for 24 hours
- CThree meridian altitudes of the Moon
- DMorning star/Sun sights, a Sun line, latitude at LAN, an afternoon Sun line, and evening star sights✓ Correct
Explanation
The classic day's work combines morning observations, a forenoon Sun line advanced to the noon latitude (a running fix at LAN), an afternoon Sun line, and an evening round of star sights — giving fixes spread across the day to control the DR.
Authority: Bowditch (Pub. No. 9)
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
- The Day's Work
A typical celestial 'day's work' at sea includes morning stars, a forenoon Sun line, Local Apparent Noon, an afternoon Sun line, and:
- The Day's Work
Which sequence best describes the classic celestial 'day's work' at sea?
- 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: