Abstract: An audio device with a body configured to be worn on or abutting an outer ear of a user, wherein the body is configured to contact at least one of the outer ear and the portion of the head that abuts the outer ear, at two separate spaced contact locations, and wherein the body is compliant at a body portion that defines one of the contact locations. The device also has an acoustic module carried by the body and configured to locate a sound-emitting opening anteriorly of and proximate the user's ear canal opening when the body is worn on or abutting the ear of the user.

Abstract: An improved explosively formed penetrator and a method of manufacturing same for forming an elongated rod-like penetrator having aerodynamically stabilizing fins, but without requiring any exotic production processes for shaping or modifying the characteristics of a conventional liner normally used in such penetrators. The present invention comprises a specially shaped thin foil which is placed between the liner and the explosive charge and which provides a selected plurality of radial legs which, in a preferred embodiment, are symmetrically placed around a center portion axially aligned with the center of the liner. The combined axial thickness of the liner and the radial legs of the thin foil lag behind the thinner portions of the liner alone, thereby causing the explosively formed penetrator to form unevenly, hence forming fins.

Abstract: A motorboat is controlled by a following water skier, when he or she is solo waterskiing, without the assistance of any driver. Optionally, a driver may operate the motorboat while towing a water skier, and an observing passenger is viewing the water skier. Optionally, a driver may operate the motorboat, with or without a passenger, and not towing a water skier. Motorboat operational controls, located both at the control center of the motorboat and on the skier's tow handle include: start and stop the motor; increase or decrease of throttle settings; select cruise speeds; turn left or right; actuate horn; automatic switches to stop engine when water skier removes his or her hands from tow rope handle and/or falls. The control signals are transmitted via electronic circuit wires extending throughout the center of a tow rope assembly and beyond. Optionally, control signals are transmitted by ultra high frequencies and related signal equipment.