A derrick is a spar, made of wood or steel, rigged as a swinging boom and used for hoisting boats, stores, cargo, ammunition or gear in and out of a ship.
Isilenge sisixhobo esenziwe ngoboya okanye ngentsimbi esetyenziswa ukugquma intsika yeseyile ithi isebenza ukunyusa inqanawa igcine umthwalo wezithuthi nangaphandle kwenqanawa.