Abstract: A submergible wave energy converter and method for using the same are described. In one embodiment, the wave energy converter may be used for deep water operations. In one embodiment, the submergible wave energy converter is an autonomous unmanned vehicle that enables remote ocean power generation. In one embodiment, the wave energy converter apparatus comprises an absorber having a body with an upper surface and a bottom surface and at least one power take-off (PTO) unit coupled to the absorber and configured to displace movement of the absorber body relative to a reference, where the power take-off unit is operable to perform motion energy conversion based on displacement of the absorber body relative to the reference in response to wave excitation, and where the power take-off unit is operable to return the absorber body from a displaced position to a predefined equilibrium position and to provide a force acting on the absorber body for energy extraction.