Abstract: Disclosed is a power supplying assembly adapted for conducting electrical current from a current source to a model watercraft being propelled on a water surface. The assembly comprises a generally hollow body adapted for placement below the surface of the water, which body defines one or more, preferably two parallel air chambers each having an access opening for an electrical contact from the watercraft, and one or more electrical conductors extending within each air chamber. This assembly prevents loss of electrical current as a result of contact of the supply conductors with water.