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Typical fields in a recreational diver's log book would be the following: Header - Contains basic information about the date, time and location of the dive. Profile - Records sufficient detail to show the profile of the dive. Equipment - Shows what the diver was wearing and what dive gear was used during the dive.
A pony bottle or pony cylinder is a small diving cylinder which is fitted with an independent regulator, and is usually carried by a scuba diver as an auxiliary scuba set.In an emergency, such as depletion of the diver's main air supply, it can be used as an alternative air source or bailout bottle to allow a normal ascent in place of a controlled emergency swimming ascent.
Dive profile of an actual dive as recorded by a personal dive computer and displayed on a desktop screen using dive logging software. In this case depth is in metres. Personal dive computer display of dive profile and log data. A dive profile is a description of a diver's pressure exposure over
Navigation is a common activity during dives. Diver navigation, termed "underwater navigation" by scuba divers, [16] is a set of techniques—including observing natural features, the use of a compass, and surface observations—that divers use to navigate underwater.
A diver with a RMV of 40 L/min at 50 msw (6 bar) for 10 minutes will consume 40 × 6 × 10 = 2400 litres of free air – the full capacity of a 12-litre 200 bar cylinder. Imperial examples: A diver with a SAC of 0.5 cfm (cubic feet per minute) at 100 fsw (4 ata) will consume 0.5 × 4 × 1 = 2 cfm surface equivalent.
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Attaching buoys is one of the main processes by which underwater logs are salvaged from the bottom of lakes and rivers. First, a scuba-diver must locate the sunken logs in the water, searching from about three feet from the bottom of the lake or river. Then, a buoy is placed around the log about three feet from its back.
In scuba diving, the dive log documents the experience of a diver by logging a diver's dives. In the fishing industry, a logbook is used to record catch data as part of the fisheries regulations. It is then submitted to the fishing authorities of the vessel's flag state. [citation needed]
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