Abstract: A lock for a vehicle such as a motorcycle includes a housing having a U-shaped portion and a transverse portion attached thereto. A first terminal end of the U-shaped portion is removeably received within an opening on the transverse portion allowing the housing to be secured about a portion of a vehicle. Removeably received within the transverse portion is a tubular insert having a keypad thereon in communication with an audible alarm means. The alarm means is in communication with a wire disposed within the U-shaped portion for emitting an audible alarm if the U-shaped portion is severed. The alarm means also activates a cellular transmission means for automatically dialing a predetermined number upon the alarm means being activated.

Abstract: A vehicle locating system (VLS) comprises a large number, for example, several million, vehicle-mounted transmitters and several benchmark transmitters; first, second and third signal relay stations and a central processing station at which the transmitter locations are determined, the central station being connected by conventional links to subscriber stations. One hundred microsecond-long RF signals are transmitted by each transmitter in a non-synchronized, mutually random manner. Each signal comprises a 20 microsecond synchronization symbol followed by six, four bit transmitter indentification symbols, each of ten microseconds length. Following the indentification symbols are 10 microsecond message and processing symbols. The control station includes correlation means for correlating the synchronization symbols on each relayed signal against stored data to identify the beginnings of the signals.