John R. Clarke (born November 20, 1945) is an American scientist, private pilot and author. He is currently the Scientific Director at the United States Navy Experimental Diving Unit (NEDU). Clarke is recognized as a leading authority on underwater breathing apparatus engineering. Clarke is the youngest of four children; his siblings are now deceased. In 1969, Clarke volunteered for the United States Army Reserves. He was promoted to first lieutenant in 1974 then Captain in 1979. Clarke was honorably discharged in September 1980. More information...
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