Manned Evaluation of the NCSC Diver Thermal Protection (DTP) Passive System Prototype.

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Manned Evaluation of the NCSC Diver Thermal Protection (DTP) Passive System Prototype.

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Title: Manned Evaluation of the NCSC Diver Thermal Protection (DTP) Passive System Prototype.
Author: Piantadosi, CA; Ball, DJ; Nuckols, ML; Thalmann, ED
Abstract: Twenty-eight, long duration, manned, air dives were performed at the Navy Experimental Diving Unit in 35 - 42 F (1.7 - 5.6 C) water and depths of 10 FSW and 70 FSW to evaluate the effectiveness of the NCSC Diver Thermal Protection (DTP) Passive System Prototype. Measurements used to establish rates of heat loss in divers wearing the DTP prototype included body core temperature, mean skin temperature, and mean body convective heat loss. These measurements were compared with currently accepted physiological criteria for thermal exposures in divers to obtain guidelines for use of the system. Results indicated that the DTP Passive System Prototype can safely support a working diver for up to six hours, and a resting diver for up to three hours, in 35 - 42 F (1.7 - 5.6 C) water. Depth dependent degradation of suit performance was not observed, as suit insulation averaged 1.0 clo at both test depths. Attempts by cold resting divers to rewarm themselves with intermittent leg exercise were sometimes associated with a small body core temperature afterdrop which could be overcome by continued exercise. Problems requiring additional design and test effort were encountered with inadequate thermal protection of the extremities, particularly the hands, and inadequate sealing of the dry suit outergarment. (Author)
Description: Citation Status: Active; Citation Classification: Unclassified; Title Classification: Unclassified; Report Classification: Unclassified; Identifier Classification: None; 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/3356
Date: 1979

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