The method involves comparing a value of variation in pressure between measured ambient and reference pressure values to a trigger threshold. A dive mode is activated if the variation value is higher than the threshold, and the value is compared to a prese...

The device has an electronic circuit to control hour and minute needles (10, 11), in a historic mode, such that the needles indicate change of a stored value of a physical quantity such as pressure or temperature, according to time, in comparison with scal...

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...