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The spiracle is often located towards the top of the animal allowing breathing even while the animal is mostly buried under sediments. [5] As sharks adapted a faster moving lifestyle some became obligate ram ventilators , breathing exclusively by forcing water through their gills by swimming; among these are requiem sharks and hammerhead sharks ...
The mechanism discharges gas to the environment in proportion to breathing volume to induce this gas feed. In the PVR-BASC the discharged gas volume is a function of depth and breath volume . The passive addition occurs during each inhalation as the loop volume is deficient by the amount discharged.
The Halcyon RB80 is a non-depth-compensated passive addition semi-closed circuit rebreather of similar external dimensions to a standard AL80 scuba cylinder (11-litre, 207-bar aluminium cylinder, 185 mm diameter and about 660 mm long).
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For many years the IDA71 and similar have been a standard Russian frogman's and naval work diver's breathing set. The "71" in its name may be the year that it was designed, like with the numbers in the names of the AK series of Russian rifles. The name IDA comes from Russian: Изолирующий дыхательный аппарат (translit.
Lambertsen designed the LARU while a medical student and demonstrated the LARU to the Office of Strategic Services (OSS) (after already being rejected by the U.S. Navy) in a pool at the Shoreham Hotel in Washington D.C. in 1942 [3] [4] The OSS "Operational Swimmer Group" was formed and Lambertsen's responsibilities included training and developing methods of combining self-contained diving and ...
The tasselled wobbegong (Eucrossorhinus dasypogon) is a species of carpet shark in the family Orectolobidae and the only extant member of the genus Eucrossorhinus. It inhabits shallow coral reefs off northern Australia, New Guinea, and adjacent islands. Reaching 1.8 m (5.9 ft) in length, this species has a broad and flattened body and head.
Swimfin from Aqualung Diving regulator Aqualung Legend (2010) Diving cylinder for 200 Bar with DIN cylinder valve from Aqualung. Aqualung Group (formerly Aqua Lung International, and prior to that La Spirotechnique) [1] is a manufacturer of self-contained breathing apparatus and other diving equipment.