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    Re: a question of time or times
    From: Greg Rudzinski
    Date: 2011 May 29, 16:07 -0700

    Alan,

    At sea it is standard practice to stay on the zone time that is within 7* 30' longitude or less of the nearest zone meridian. This makes figuring sunrise, sunset, civil twilight, and LAN within 30 minutes of the NA listed time. Figuring the actual time for NA time listings requires an arc to time correction from the DR longitude to the zone meridian. Also be aware that most tide tables use standard time so an hour has to be added to get to daylight time.

    Greg Rudzinski
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