A method and system of position determination of an implement on a work vehicle. The method includes determining a position of a first radio frequency (RF) device relative to a local reference frame using ultra-wideband ranging between the first RF device and at least one additional RF device. The first RF device is coupled to a fixed location on the implement, and the additional RF device is mounted at a fixed location relative to the local reference frame. The implement is controllably movable relative to the local reference frame. A position and orientated of the implement is determined relative to the local reference frame based at least in part on the determined position of the first RF device relative to the local reference frame.