Abstract: A portable diving apparatus, which comprises: (a) a water proof casing which comprises an external key pad; (b) a portable computing device within said water proof casing, said portable computing device comprises a diving module; (c) a pressure sensor which is mounted at least partially outside said water proof casing; (d) an adaptor within said water proof casing for receiving key pad entries from said key pad by means of first cable, and pressure indications from said pressure sensor by means of third cable, and for converting said key pad entries and said pressure indications to key pad data and pressure data respectively in a standard communication protocol, and transferring said data in said (wired or wireless) standard communication protocol into said portable computing device, wherein at least said pressure indications are processed by said diving module of said portable computing device and displayed as diver information on a display of said portable computing device.

Abstract: A portable diving apparatus, which comprises: (a) a water proof casing which comprises an external key pad; (b) a portable computing device within said water proof casing, said portable computing device comprises a diving module; (c) a pressure sensor which is mounted at least partially outside said water proof casing; (d) an adaptor within said water proof casing for receiving key pad entries from said key pad by means of first cable, and pressure indications from said pressure sensor by means of third cable, and for converting said key pad entries and said pressure indications to key pad data and pressure data respectively in a standard communication protocol, and transferring said data in said (wired or wireless) standard communication protocol into said portable computing device, wherein at least said pressure indications are processed by said diving module of said portable computing device and displayed as diver information on a display of said portable computing device.

Abstract: The present invention relates to an arrangement in an underwater apparatus having an electronic circuitry, for enabling recharge of the apparatus battery while the apparatus is in recharge state, and for preventing discharge of said battery when the apparatus is in operative state and underwater, the arrangement comprises: (a) connector at the outer sealing of the apparatus with contact points, wherein in a recharging state a charger is connected to said contact points; (b) a first switching device within the apparatus having active and inactive states, wherein in its active state the device connects said contact points to the battery therefore enabling recharge, and in the inactive state the device disconnects said contact points from the battery; and (c) external means for changing the state of the switching device from its active state to its inactive state or vice versa without opening the apparatus sealing.