A storage pixel sensor comprises a photosensor selectively connectable to a reset potential; a switched buffer amplifier having a control terminal coupled to said photosensor, a first terminal connected to a source of a transfer signal, and a second terminal; a storage capacitor coupled to said second terminal of said switched buffer amplifier; and an amplifier coupled to said storage capacitor. The method includes detecting thrust and steering commands from an operating device which is connected to a control unit, and controlling the drive arrangement based on detected commands from the operating device for obtaining a desired course of travel of the watercraft, wherein a force is generated which acts towards a defined position on the watercraft. The rotational speed of the magnetic field is quickly accelerated to quickly accelerate the magnetic rotor, thereby quickly reaching a liftoff speed associated with the compliant foil fluid film radial bearing to prevent damage thereof. The security system may include, for example, a digital rights manager. Notches of different sizes are provided centrally of the upper and lower edges and the head is reinforced by a rearwardly extending neck which, in a preferred embodiment, includes a pair of spaced notches oriented rearwardly of a rear face of the head and toward a handle of the tool.