Support for the boom, holding it up out of the way when the boat is at anchor.
A notched support built off the deck for the boom when the sail is furled
support for the boom, holding it up and out of the way when the boat is anchored or moored. Unlike a gallows frame, a crutch is stowed when boat is sailing.
A vertical support to hold up the boom when the sails are furled or when hoisting the mainsail in order to keep the boom in position.
A term applied to a light structure built up from a deck to support the free end of a boom when it is not in use. Also called a boom rest.