Accession Number:

ADA148300

Title:

Manned Testing of Two Closed-Circuit Oxygen Underwater Breathing Apparatus: U.S. Navy Emerson Rig and Fenzy PO.68.

Descriptive Note:

Final rept.,

Corporate Author:

NAVY EXPERIMENTAL DIVING UNIT PANAMA CITY FL

Personal Author(s):

Report Date:

1984-09-01

Pagination or Media Count:

22.0

Abstract:

The breathing characteristics of two types of closed circuit oxygen Self-Contained Underwater Breathing Apparatus SCUBA, at a pressure equivalent to 30 feet of sea water were studied in the Ocean Simulation Facility of the Navy Experimental Diving Unit. Breath-by-breath curves of inhaled and exhaled oxygen and carbon dioxide levels and inspiratoryexpiratory pressure curves were recorded. For the first type, the U.S. Navy Recirculating Underwater Breathing Apparatus, Closed-Circuit, Oxygen Emerson Rig, the carbon dioxide absorbent canister duration at 70 deg F 21 deg C exceeded the arbitrary cutoff of 240 minutes with diver-subjects doing moderate work at 40 deg F 4 deg C the canister duration was 199 minutes. For the second type, the Fenzy PO.68, the canister duration at 70 deg F 21 deg C was 95 minutes, and no studies were done at 40 deg F. Both types were able to support divers doing hard work. Five cases of oxygen toxicity were seen, including three divers with mild symptoms, one with a near-convulsion, and one with a convulsion. Originator-supplied keywords include Graded exercise, and Breathing resistance.

Subject Categories:

  • Stress Physiology
  • Life Support Systems

Distribution Statement:

APPROVED FOR PUBLIC RELEASE