Three-fin surfboard design created by Simon Anderson of Australia in 1980; now the most common fin setup used by surfers, the Thruster combines drive and control in most surfing situations.
A way of controlling a satellite's attitude. Thrusters usually contain compressed gas that when sent out of the end of the thruster will move the satellite in space. The force of the compressed gas (the action) causes the satellite to move in the opposite direction (the reaction). This is Newton's third law of motion - for every action there is an equal and opposite reaction.