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Coda Octopus Deployment

Coda Octopus Deployment. John S. Allen University of Hawaii- Manoa Honolulu, HI 96822. Proposed Collaborative Project : NUWC Keyport . Prevent Combat Swimmer Entry into Area of Treatment Pier. May-June 2013 – Passive Acoustics (Coda Octopus), September 2013- Sonar, Navy Seals .

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Coda Octopus Deployment

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  1. Coda Octopus Deployment John S. Allen University of Hawaii-Manoa Honolulu, HI 96822

  2. Proposed Collaborative Project : NUWC Keyport Prevent Combat Swimmer Entry into Area of Treatment Pier May-June 2013 – Passive Acoustics (Coda Octopus), September 2013- Sonar, Navy Seals

  3. Project Justification: The Joint Base Pearl Harbor-Hickam (JBPHH) Deperm facility commenced operations in FY 2012. A reliable undersea threat detection capability is required in order to provide increased level of protection for high-value Naval assets during deperming operations. Specific Goal for current FY: Presently, most challenging threat to detect and track is combat swimmer utilizing Closed-Circuit Rebreather (CCR). NUWC Code 244 will partner with University of Hawaii UARC (Dr. Allen) to collect acoustic signals emitted by divers with CCRs. Diving near the Deperm Facility, divers will make lateral passes on the hydrophone array (provided by UH/Dr. Allen) and single broad-band hydrophone (provided by NUWC NPT Sound Lab) at various ranges. Range selections vary from “loudly audible” to “definitely not audible”. Goals are to continue development in following FY with proof of concept. This year’s activities should collect the data necessary to determine the way-ahead. Sponsors: NUWC Keyport and JBPHH Customers: COMSUBPAC N99 and PMS 480

  4. Closed Circuit Diver Detection Gas expansion Gas expansion Passing Vessel Rebreather

  5. Underwater Breathing Apparatus (UBA)acoustic characterization Knowledge on the target acoustic emission is a prerequisite for passive acoustic detection Laboratory measurements performed in semi-anechoic basin to characterize frequency content and source level of the acoustic events associated with the operation of UBAs Many open circuit UBA and more than a dozen of civil and military rebreathers characterized L. Fillinger, TNO, Den Haag

  6. December 2011: Experiments in Royal Netherlands Navy port in Den Helder Diver track Boat track The system was deployed in various configurations to address several issues: Data analysis is ongoing

  7. Active: Acoustic Source Characterization Collaboration with FOCUS, R. McGough, EE, Michigan State Univ.

  8. Recent studies indicate more intricate echolocation processes Acoustic array allows to understand 3D composition of echolocation signals Ability to work with a false killer whale (Pseudorcacrassidens)

  9. Echolocation beam in odontocetes(collaboration with UH Marine Mammal Lab) Well studied in horizontal and vertical planes Limited to certain species

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