In episode 11 of the Celestial Navigation series, learn how to pre-calculate the time of nautical and civil twilight, as well as correcting a star sight and how to use the sidereal hour angle to reduce your sight.

In episode 11 of the Celestial Navigation series, learn how to pre-calculate the time of nautical and civil twilight, as well as correcting a star sight and how to use the sidereal hour angle to reduce your sight.
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