out·rig·ger | \ ˈau̇t-ˌri-gər
1a : a projection with a float or a shaped log at the end attached to a boat to prevent capsizing
b : a spar or projecting beam run out from a ship's side to help secure the masts or from a mast to extend a rope or sail
2 : a boat equipped with an outrigger
3 : a projecting member run out from a main structure to provide additional stability or to support something especially : a projecting frame to support the elevator or tailplanes of an airplane or the rotor of a helicopter