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| Title: | Purging Procedures for the Draeger LAR V Underwater Breathing Apparatus. |
| Authors: | NAVY EXPERIMENTAL DIVING UNIT PANAMA CITY FL
Butler Jr, FK
Thalmann, ED |
| Keywords: | Breathing apparatus
Underwater equipment
Purging
Removal
Nitrogen
Oxygen
Concentration(Chemistry)
Methodology
Efficiency
Breathing gases
Mixtures
Diving
Covert operations
Naval operations
Swimmers
Warfare |
| Issue Date: | 1984 |
| Abstract: | The U.S. Naval SEAL teams currently utilize the Draeger LAR V closed-circuit oxygen Underwater Breathing Apparatus (UBA) for clandestine combat swimmer operations. Prior to beginning a dive with a closed-circuit oxygen UBA, a purge procedure is carried out to remove inert gas (nitrogen) from the breathing mixture. This study seeks to establish an optimal purging procedure for the Draeger LAR V. Twenty-four purges were conducted using the current Standard three fill/empty cycle purge procedure; the average oxygen percentage obtained in the breathing mix was 85percent with a high of 96percent and a low of 73percent. Fifty-four Single Fill/Empty Cycle (SFE) purge procedures resulted in an average oxygen percentage of 74percent with a high of 89percent and a low of 50percent. Forty No Fill/Empty Cycle (NFE) purge procedures resulted in an average oxygen percentage of 55percent with a high of 82percent and a low of 20percent. Eighteen 2-hour dives using the two experimental purge procedures showed no significant inert gas buildup during the course of the dive. |
| 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. |
| Gov't Doc # : | ADA140673
NEDU-5-84 |
| URI: | http://archive.rubicon-foundation.org/3523 |
| Appears in Collections: | Naval Experimental Diving Unit (NEDU)
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Size | Format |
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| NEDU_1984_05.pdf | 3129Kb | Adobe PDF | View/Open |
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