Define stern thruster

stern thruster. A propeller mounted at the rear of a ship that allows greater maneuverability at slow speeds, such as when docking.

In context . . .

"The azimuthing pod propulsion system is a relatively recent high-tech installation. It replaces conventional propeller shafts, propellers and rudders, negates the need for stern thrusters, and saves valuable machinery space."

Douglas Ward
Complete Guide To Cruising and Cruise Ships 2007

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