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MK-20 MK-20 in use during the TWA flight 800 salvage with SCUBA.
The MK-20 diving rig is utilized in the U.S. Navy primarily for underwater ship's husbandry and enclosed space diving. The MK-20 design derived from the AGA. The MK-20 can be utilized with the diving umbilical for surface supplied diving operations or with SCUBA. If used with SCUBA, the diving mask is attached to the intermediate hose in place of the second stage regulator. The MK-20 is made of rubber and plastic and is extremely lightweight.

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Copyright 1998, Deep Sea Diving Locker
Last revised: April 09, 2000