Nautical Term: Sagging
Definition of Sagging
When the various forces acting upon a ship cause it to bend longitudinally with a concave up shape, the ship is said to be sagging. Sagging is the opposite of hogging, where the ship bends longitudinally with a concave down shape.
For instance, in a heavy sea, a ship may experience heavy waves that cause the stern to lift and the bow to dig in. This can result in the ship hogging. However, if the ship encounters lighter waves, the ship may sag as the forces on the ship are not strong enough to cause hogging.
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