(n) :
a device for propelling an object, especially a spacecraft or a ship (marine vessel); a surfboard (usually a shortboard) with three fins of approximately equal size, one centred at the back, one on each side about 25cm forward and out near the rails
(n) :
a device for propelling an object, especially a spacecraft or a ship (marine vessel); a surfboard (usually a shortboard) with three fins of approximately equal size, one centred at the back, one on each side about 25cm forward and out near the rails