Category: Navigation

What equipment do I need for Astro-Navigation


  • Sextant
  • Watch
  • Nautical Almanac
  • Sight Reduction Tables 
  • Plotting equipment 

Read more: Equipment required for Celestial Navigation

Category: Navigation

MCA Celestial Navigation Exam prep

Article 1

Problems with time

The MCA in their infinite wisdom have decided to use the traditional method of using 12 hour clocks on their vessels. This means that 2 clocks with hands are carried. One is used to measure SHIPS TIME (Local time), the other, the CHRONOMETER or DECK WATCH is used to measure UT.

The problem with this is that your CHRONOMETER (with its hands), can show 2 potential times,


 e.g. 05:00 or 17:00?


For the full article in PDF format, click here

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