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    Re: Port Chalmers Time Ball
    From: David C
    Date: 2023 Jun 8, 20:05 -0700

    From the  1929 Nautical Almanac is this note about Wellington:

    "Precise time for chronometer-rating purposes may be obtained nightly by light signals shown at the Dominion Observatory."

    Unfortunately no other information is  provided on how this system worked.

    David C

       
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