Comparison Tests of the USN MK 1Mod O Mask in Standard Configuration and the USN MK 1Mod O Mask with Scubapro Pilot Second Stage at Varying Supply Pressures.

摘要

The USN MK 1 Mod O mask in standard configuration was tested unmanned at varying air supply pressures to determine the minimum acceptable over bottom supply pressure. These tests were run in an effort to duplicate and verify results achieved in an NEDU manned test described in reference 3. Various breathing rates and tidal volumes were tested at varying depths until breathing resistances similar to those achieved by working divers in reference 3 were attained. This combination of breathing rate and tidal volume was then used for the duration of the tests. This test is significant in this is the first attempt to exactly duplicate manned test results in an unmanned test situation. That results were almost identical lends credibility to unmanned test simulations and their place in equipment evaluations. Results verified those found in reference 3. A minimum of over bottom air supply pressure of 135 psig must be maintained at the diving console to prevent excessive inhalation resistance in heavy work conditions.