The time each division of crew has duty. The line where the water comes to on the hull of a boat. Design waterline is where the waterline was designed to be. Load waterline is the waterline when the boat is loaded. The painted waterline is where the waterline was painted.
Actual waterline is where the waterline really is at any given time.
A river, canal or other body of water that boats can travel on. The progress of a boat. A section parallel to the shore for docking and unloading vessels. One of two methods used to steer a boat. A wheel is turned in the direction that the helmsman wants the boat to go.