Portable device, e.g. a diver's or waterproof watch (1), has a plurality of capacitive sensors for detecting the presence of water around the watch. The watch also has a pressure sensor and means for measuring and monitoring the capacitance of the capacita...

Electronic diver's watch has bi-directional drive means for both the minute and hour hands that permit their use in displaying diving data. Thus the hour hand (11) can be used to display vital information, such as the time that a diver is to spend decompre...

The watch has a bidirectional unit to move hour and minute hands respectively. A diving mode of operation is provided, in which the hands displaying the current time is used to display data relating to dive. The hour hand provides information vital to wear...

The invention concerns a portable device (10) for determining horizontal and vertical positions. It comprises an altimeter (15) including a pressure sensor calibrated at a predetermined initial altitude, a GPS signal receiver (12) designed to receive throu...