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In fishkeeping, a refugium is an appendage to a marine, brackish, or freshwater fish tank that shares the same water supply. It is a separate sump , connected to the main show tank. [ 1 ] It is a " refugium " in the sense that it permits organisms to be maintained that would not survive in the main system, whether food animals, anaerobic ...
The Dry Combat Submersible is 12 metres (39 ft) long and has a beam and height of 2.4 metres (7.9 ft). [4] [1] [citation needed] The submersible weighs 14 tonnes (31,000 lb) fully loaded and has a displacement of 28 tonnes (62,000 lb). [5] It can be transported in a standard 40-foot shipping container. [3]
United States Navy. 24 May 1999. Archived from the original on 29 April 2003. Chief of Naval Operations (27 April 2000). "Operational Concepts for the Submarine NR-1" (PDF). OPNAVINST 3930.7D. Archived from the original (PDF) on 1 March 2012. Feldman, Gene Carl (10 April 1996). "A Dive on the NR-1". Jason VII: Adapting to a Changing Sea.
Designed by the Commanding Officer of SOE's Inter Services Research Bureau (ISRB), Lt Col. John Dolphin, as a method of delivering a large explosive charge below an enemy ship, the Welman was a submersible craft 20 feet 6 inches (6.25 m) in length (including explosive charge), weighing about 2,000 pounds (910 kg).
Traditionally, the personnel sphere of a deep sea submersible is manufactured of titanium plates that are welded together. On Mir, the personnel sphere is made of a maraging steel alloy that has ten percent better strength/weight ratio than titanium. [1] This alloy contains about 30% cobalt and smaller amounts of nickel, chrome and titanium.
The one-man submersible displayed little functional military potential. However, it substantiated and characterized the need for improved and expanded UDT capabilities. [ 5 ] After the war, development continued in a garage-shop fashion by various UDT units, and included various "Marks" such as the Mark V, VI, and VII.
Refugium, plural refugia, the Latin for "refuge" or "hideaway", may refer to: Refugium (fishkeeping) , an appendage to a marine, brackish, or freshwater fish tank that shares the same water supply Refugium (population biology) , a location of an isolated or relict population of a once widespread animal or plant species
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