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Sag.

1. The bending downward of the middle of a beam or other object supported at both ends. Sometimes beams are framed with a slight camber, which neutralizes the sag.

Hogging is the depression of the ends when supported in the middle. See hog-frame.

2. The movement of a ship when making considerable lee-way. It is the opposite of holding a good wind, or bearing up well to windward.

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