jury mast
A temporary mast erected to replace a damaged or lost mast on a sailing vessel. Rare term, mainly encountered in nautical contexts.
See also: マスト
The ship, having lost its mainmast in the storm, returned to port with a jury mast rigged.
Compound of 仮 (かり, 'temporary') and マスト ('mast'). The nautical term 'jury mast' is of uncertain origin, possibly from Old French ajurie ('help, relief').