Electronic time-counter for the diving

An electronic time-counter for diving, the time counter being carried by a diver during the dive and comprising:

• a source of electric energy;
• time base means coupled to the source and providing a time base signal;
• divider means providing a pulsed time unit signal in response to the time base signal;
• counter means for counting the pulses of the time unit signal, the counter means being switchable between an enabled condition in which the counter means count the pulses, and a disabled condition in which the counter means perform no counting of the pulses, the counter means including at least a portion which is resettable to zero;
• display means for visually displaying the count of the counter means;
• pick-up means for automatically placing and maintaining the counter means in the enabled condition under the action of water at the immergence of the electronic time-counter and for automatically placing and maintaining the counter means in the disabled condition under the absence of water at the emergence of the electronic time-counter;
• and
• control means which are manually operable for resetting to zero the portion of the counter means to provide for the measurement of intermediate time periods between the immergence and emergence of the electronic time-counter of a dive.