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Split images are popular in recreational scuba magazines, often showing divers swimming beneath a boat, or shallow coral reefs with the shoreline seen in the background. Over/under shots present some technical challenges beyond the scope of most underwater camera systems.
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.
Scubapro – Brand of scuba diving equipment – Scuba regulators, fins, lights, dive computers, Seacraft (DPV brand), also known as Marine Tech S.A. – Polish manufacturer of diver propulsion vehicles. [119] Seac Sub Italian manufacturer of diving equipment for scuba, freediving, spearfishing and snorkelling. [120] Seadive – (See Oceanways ...
If the regulator free-flows and freezes, the diver should close it down and switch to the backup, and terminate the dive. When diving in pack ice, the surface team must constantly monitor ice movement to ensure that the exit is not compromised. [2] The diver must ensure that there is always a positive indication of the route to the exit area.
Recreational scuba diver The undersea kelp forest of Ana Capa off of the coast of Oxnard, California Diver looking at a shipwreck in the Caribbean Sea. Scuba diving is a mode of underwater diving whereby divers use breathing equipment that is completely independent of a surface breathing gas supply, and therefore has a limited but variable endurance. [1]
Underwater breathing apparatus can be classified as open circuit, semi-closed circuit, (including gas extenders) or closed circuit (including reclaim systems), based on whether any of the exhaled gas is recycled, and as self-contained or remotely supplied (usually surface-supplied, but also possibly from a lock-out submersible or an underwater habitat), depending on where the source of the ...
Bob Halstead (24 October 1944 – 18 December 2018), has made significant contributions to the sport of scuba diving in a multitude of capacities: photographer, author of eight diving books, early innovator in the development of dive tourism, pioneer in the dive liveaboard industry, diving instructor and educator, marine-life explorer and influential diving industry commentator.