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A snorkel is used to allow the user to breathe atmospheric air when their face is immersed in water while swimming or floating at the surface. [1] To work effectively, the snorkel must allow the user to inhale and exhale comfortably over an extended period, and provide a sufficient volume of air with appropriate oxygen and carbon dioxide content to maintain a sufficient and comfortable ...
The dip tube, anti-debris tube, or valve snorkel is a short tube screwed into the hole in the bottom of the valve body, which projects into the cylinder internal space. Its function is to prevent any loose debris inside the cylinder from getting into the outlet passages if the cylinder is inverted in use, as such material may clog or jam the ...
As snorkels were designed to draw in and vent gases, a submarine's diesel exhaust could be seen on the surface up to a distance of about 4.5 km (2.8 mi). [8] Also, "periscope feather" (the wave created by the snorkel or periscope moving through the water) can be spotted in calm seas.
The word SCUBA was coined in 1952 by Major Christian Lambertsen who served in the U.S. Army Medical Corps from 1944 to 1946 as a physician. [1] Lambertsen first called the closed-circuit rebreather apparatus he had invented "Laru", an (acronym for Lambertsen Amphibious Respiratory Unit) but, in 1952, rejected the term "Laru" for "SCUBA" ("Self-Contained Underwater Breathing Apparatus"). [2]
Aeris brand covered a wide range of recreational scuba equipment, including regulators, dive computers, buoyancy compensators, harnesses, masks, fins, and snorkels. [2] Aerotec Industries Inc. Norseman scuba regulators. [3] Aer-Sub, also known as Spiro-Sub – Branding used by Cressi-Sub for scuba equipment Trademarks used by Cressi-sub. [4]
Luxury carmaker Ferrari <RACE.MI> has begun making parts to convert snorkel masks into respirators for treating patients with coronavirus and protecting medical workers. The idea of adapting the ...