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A display of cylinder pressure is available on air-integrated computers, either via a direct high pressure hose, or remotely via a pressure transducer and through-water transmission. Distance line , guide line, or "come-home-line" can be used to guide the diver back to the start point and safety in poor visibility.
A level-1 diver can dive to a maximum depth of 20 m when under the direct supervision of at least a level-4 diver. A level-2 diver can dive to a maximum depth of 20 m with other level-2 (minimum) divers, and up to 40 m under the direct supervision of a level-4 diver.
An underwater acoustic positioning system [1] [2] is a system for the tracking and navigation of underwater vehicles or divers by means of acoustic distance and/or direction measurements, and subsequent position triangulation.
A dedicated valve on an extra low pressure hose can be used at the bottom opening of the buoy. The diver can orally inflate the buoy through an oral inflation valve, if fitted. In all cases, the amount of slack line should be kept to a minimum to reduce the risk of fouling on the diver or equipment, and the reel or spool held away from the ...
Nav finder and underwater compass – basic underwater navigation tools Suunto SK-7 diving compass in aftermarket wrist mount with bungee straps. Diver navigation, termed "underwater navigation" by scuba divers, [1] is a set of techniques—including observing natural features, the use of a compass, and surface observations—that divers use to navigate underwater.
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