Finding Gyro Error from Amplitude of the Sun
Автор: The Chart Table
Загружено: 2026-02-13
Просмотров: 65
Описание:
In this video, I walk you through how to find gyro error using the amplitude of the sun—a classic celestial navigation technique that still works when electronics fail or you just want to verify your instruments.
You’ll see the full, real-world process using:
A telescopic alidade to observe the Sun at sunrise/sunset
The Nautical Almanac to get the Sun’s declination
Bowditch (Pub. 9) to compute true amplitude and compare it with gyro bearing
I break the steps down clearly:
How to take the bearing of the Sun
How to find the Sun’s true amplitude from tables
How to compare true bearing vs gyro bearing
How to determine the direction and amount of gyro error
This method is especially useful for:
Deck cadets and maritime students
Navy Quartermasters
Navigators prepping for exams
Mariners who want a solid backup to electronic navigation
Anyone curious about traditional navigation techniques
If you found this helpful, drop a like, and let me know if you want a follow-up video on gyro error using azimuths, stars, or planets.
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