Abstract: A scuba tank accessory unit improves the diver experience by providing a streamlined diving unit for a back mounted diving device. The diving unit has a propulsion unit having a space for mounting a battery powered electric motor, armature extending out one end of the propulsion unit and further attached to a propellor. A battery pack is contained in a housing unit located either concentrically about the electric motor or atop it such that the electric motor extends slightly therein with a depression or cavity at the bottom of the housing unit.

Abstract: A scuba tank accessory unit improves the diver experience by providing a streamlined diving unit for a back mounted diving device. The diving unit has a propulsion unit having a space for mounting a battery powered electric motor, armature extending out one end of the propulsion unit and further attached to a propellor. A battery pack is contained in a housing unit located either concentrically about the electric motor or atop it such that the electric motor extends slightly therein with a depression or cavity at the bottom of the housing unit.

Abstract: The present battery-powered propulsion unit for a diver's tank has an electric motor driving a propellor and mounted in a housing which is attachable to the lower end of the tank. A belt worn on the diver's waist carries first and second groups of battery holders, each made up of separable halves which are releasably attached to the belt on opposite sides of its buckle. The buckle carries a control switch for the motor which is connected by flexible cables to the motor and to the first and second groups of battery holders.