Abstract: A pile loading system for piles which are driven into the earth under a body of water wherein a buoyant vessel such as a barge or system of barges, is pinned to at least one spud positioned in the earth below the water and a rigid jacking frame is mounted on the vessel to extend above a pile. The vessel is ballasted, as by flooding, to impose a compressive load on the spud and a jack is then positioned between the pile and the frame and is actuated to transfer the load from the spud to the pile. The load may be applied for the purpose of testing the pile or for driving it further into the earth.