Download or read book Evaluation of Commercially Available Open Circuit Scuba Regulators written by James R. Middleton and published by . This book was released on 1980 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: In June 1979 the Navy Experimental Diving Unit performed unmanned tests on 36 open circuit scuba regulators currently manufactured in the United States. Breathing resistance, respiratory work and first stage performance were evaluated. Results of these tests produced a new NEDU scuba regulator performance requirement to replace the current requirement taken from Mil-R-24169A. Of the 36 regulators tested, 7 regulators met the upgraded performance standard, 22 regulators and one full face mask met Mil-R-24169A, and 6 regulators did not meet Mil-R-24169A. (Author).