— Certification
Transport Canada requires celestial navigation competency for Watchkeeping Mate and Master certificates under the Marine Personnel Regulations (TP 15136F). Candidates must demonstrate proficiency in sight reduction using approved methods.
The celestial navigation component of the TC exam includes sight reduction, position fixing using sun, moon, stars and planets, and chart work. Practice on realistic daily observations is essential preparation.
HO 249
Sailcasted simulates realistic ocean passages. Every day, you receive an astronomical observation by email — just like at sea. You reduce it with your tables (HO 249), calculate your position, and submit your fix. The platform calculates your error in nautical miles.
Observations are generated from USNO/JPL ephemerides with ±0.5 arcminute accuracy — the same precision as official nautical almanacs.
Sailcasted passages are organized into 4 tiers of increasing difficulty. Start at Tier 1 with simple observations (sun only) and progress to Tier 4 with complex observations (stars, planets, challenging conditions).
To prepare for your Transport Canada exam, you will need:
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