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19 July, 21:07

What sound signal tells a river lock attendant that you wish to go through the lock?

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  1. 19 July, 23:34
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    In order to tell a river lock attendant that you wish to go through the lock, you should sound one prolonged blast followed by one short blast.

    You should wait about 400 feet away from the lock and wait for the flashing light signal that allows you to enter.

    Also note that commercial traffic always have the first priority in entering the locks.
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