Manned Evaluation of Field Change 985 to the MK-11 UBA CO2 Absorbent Canister.

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Manned Evaluation of Field Change 985 to the MK-11 UBA CO2 Absorbent Canister.

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Title: Manned Evaluation of Field Change 985 to the MK-11 UBA CO2 Absorbent Canister.
Author: Gray, CG; Thalmann, ED
Abstract: Field Change No. 985 to the MK-11 Semi-Closed Circuit mixed-gas UBA underwent manned evaluation at a depth of 650 FSW in 35 F water. FC 985 splits the hot water supply to the diver with part heating sheath-surrounded breathing bags and hoses and part being routed to a heat exchanger inside the CO2 absorbant canister. The results of 6 manned canister duration studies showed that the canister effluent CO2 was less than 1 mmHg after canister times ranging from 5 hrs 10 min to 6 hrs 2 min. This was a significant improvement over canister duration times of previous MK-11 configuration studies. A canister duration of 6 hours was assigned to the FC 985 canister. No significant differences in breathing resistance from the previous MK-11 configuration were noted. Inspired gas temperatures exceeded the minimum inspired temperature limit of 60.3 F at 650 FSW.
Description: Citation Status: Active; Citation Classification: Unclassified; Title Classification: Unclassified; Report Classification: Unclassified; Identifier Classification: Unclassified; Abstract Classification: Unclassified; Distribution Limitation(s): 01 - APPROVED FOR PUBLIC RELEASE; Information provided by the Department of Defense and the Defense Technical Information Center (http://www.dtic.mil/) is considered public information and may be distributed or copied unless otherwise specified. Use of appropriate byline/photo/image credits is requested.
URI: http://archive.rubicon-foundation.org/4845
Date: 1981

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