The term 'BIREME PROPELLER' refers to a type of propulsion system used in ships and boats. It is composed of two or more blades that rotate around a central hub, creating thrust and allowing the vessel to move forward. The blades are connected to an OAR, which is a long pole with a flat blade at one end used for rowing. This type of propulsion system is often used in smaller vessels, such as canoes and kayaks, as it is relatively easy to operate and maintain.