Abstract: An audio police identification and distraction device that is sufficiently rugged to be thrown inside a structure to be searched and deliver electronically a digitally stored, high volume voice message that clearly identifies the police or law enforcement agency and distracts persons inside the structure during a hard entry. The audio device includes a voice message memory chip, a rechargeable battery operated power supply, an amplifier, a speaker assembly and a user activated switch and delay circuit. The audio signal output can achieve a speaker volume of at least 100 decibels, preferably in the range of 110 to 112 decibels. The electronic components are contained in a hard housing that can be tossed through a glass window and onto a floor without damage. The audio electronic circuit is battery operated and mounted on a platform that is isolated from the impact shocks imposed upon the housing.

Abstract: A marine propulsion unit providing for steerable legs for the propeller of a boat which are rotatable in steering direction through 360.degree.. A transmission is provided having spiral bevel gears arranged so that for a constant direction of rotation bearing, loading for parts below the hull can be significantly reduced. There are provided two separate legs having a common drive each being rotatable in steering direction through 360.degree. so that reverse thrust can be achieved without changing the rotating direction of the thrusting propellers relative to their support.