Unmanned Evaluation of U.S. Navy MK 11 Semi-Closed Circuit Mixed Gas UBA
Test rept. Jun-Sep 1979
NAVY EXPERIMENTAL DIVING UNIT PANAMA CITY FL
Pagination or Media Count:
NEDU performed unmanned tests on the MK 11 UBA incorporating Field Change Number 979A modified canister configuration containing a heated central core and Koegel check valves in the M-11 mask. Breathing resistance and canister duration were evaluated at depths ranging from 250 to 750 fsw. Results showed breathing resistance to be significantly improved over previous designs and capable of supporting heavy work at depths to 650 fsw. Canister durations were improved to 450 fsw however, most of this improvement was lost at 650 fsw in water below 40 deg F.
- Life Support Systems