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Collisions to be entered in official log. 
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423.—(1) In every case of collision, in which it is practicable so to do, the master of every ship shall immediately after the occurrence cause a statement thereof, and of the circumstances under which the same occurred, to be entered in the official log-book (if any), and the entry shall be signed by the master, and also by the mate or one of the crew. 
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