| 摘要 |
An inflatable position-indicating beacon 1 is provided. The beacon comprises an inflatable buoyancy means (figure 1 reference 2) and broadcasting means (4, 5) that transmit a radio signal to indicate the position of the beacon (1). The beacon may usefully be applied as a surface marker buoy or a diver's lifting- bag. The inflatable beacon can transmit its position at known emergency frequencies such as 121.5 or 243MHz. The broadcasting means may even be a RFID tag or a BluetoothRTM transmitter. When the beacon is inflated the orientation of the beacon is such that the transmitter is located on a portion away from the surface of the water. The beacon could be inflated by the diver s compressed air supply. A tether 21 is attached between the diver 20 and the inflated buoy 1. The signal from the beacon can be received by a boat who can quickly locate the diver.
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