- Any one of certain lines of a vessel, model, or plan,
parallel with the surface of the water at various heights from the
keel. - Any one of several lines marked upon the outside of a
vessel, corresponding with the surface of the water when she is afloat
on an even keel. The lowest line indicates the vessel's proper
submergence when not loaded, and is called the light water line; the
highest, called the load water line, indicates her proper submergence
when loaded.
Definition
