| 摘要 |
PCT No. PCT/EP94/03318 Sec. 371 Date Aug. 21, 1996 Sec. 102(e) Date Aug. 21, 1996 PCT Filed Jul. 10, 1994 PCT Pub. No. WO95/10433 PCT Pub. Date Apr. 20, 1995A process is disclosed for protecting watercraft against theft in an area delimited in space, for example a harbor, using a stationary transmitting/receiving unit and an on-board transmitting/receiving unit. When interrogated by the stationary unit, the on-board unit emits a characteristic identification signal. The identification signal contains a basic key that identifies the watercraft and the identification signals of all watercraft in the harbor are stored in a central computer. To legitimize use of the watercraft, a legitimization key is input into a central computer before departure. The central computer ascertains whether the use of the watercraft is legitimate based on the interrogation carried out by the stationary transmitting/receiving unit and, if required, triggers an alarm and information program. |
