The term 'dinghy propeller' refers to a type of propulsion system used on small boats. It consists of a ROWER, typically using oars, and a propeller that is powered by the ROWER's movements. The ROWER is usually seated in the stern of the boat and uses their arms and legs to move the oars in order to propel the boat forward. The propeller then provides additional thrust to the boat, allowing it to move faster and more efficiently.