Accession Number : ADA256127


Title :   Evaluation of Carleton Technology Incorporated Mouthpiece Utilized in LAR V UBA with Two Grades of Sofnolime CO2 Absorbent


Descriptive Note : Final rept.


Corporate Author : NAVY EXPERIMENTAL DIVING UNIT PANAMA CITY FL


Personal Author(s) : Giedraitis, R B ; Crepeau, L J


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a256127.pdf


Report Date : Jul 1992


Pagination or Media Count : 17


Abstract : One of the major contributions to the breathing resistance of underwater breathing apparatus (UBA) is the mouthpiece. Recently, Carleton Technology, Inc. supplied NEDU with a modified mouthpiece for evaluation. Reduced breathing resistance was obtained using the Carleton Technology mouthpiece in the MK 16 MOD 0 UBA. NEDU evaluated breathing resistance of the Carleton mouthpiece and standard MK 16 UBA breathing h fitted to the LAR V UBA using 4-8 mesh (2.5-5.0 m) and 8-12 mesh (1.0-2.5 m) Sofnolime C02 absorbent (Molecular Products, United Kingdom), comparing it to the standard Draeger LAR V mouthpiece using 4-8 mesh Sofnolime. Using Sofnolime 4-8 mesh absorbent, the Carleton mouthpiece reduced overall breathing resistance in the LAR V UBA 31.5 percent, and 20.4 percent when 8-12 mesh Sofnolime was used. These findings support the future use of smaller C02 absorbent mesh sizes in the LAR V UBA, using the enhanced canister equipped with a modified absorbent retaining screen, in combination with the Carleton mouthpiece. This would allow Longer canister durations yet simultaneously provide tower breathing resistance to the diver.


Descriptors :   *MILITARY BUDGETS , *EASTERN EUROPE , ECONOMICS


Subject Categories : Administration and Management
      Acoustooptic and Optoacoustic Devices


Distribution Statement : APPROVED FOR PUBLIC RELEASE