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Soundings Archive

NMFS Requires PAM in Proposed IHA
On September 19, 2012, the U. S. National Marine Fisheries Service published Federal Register notice of NMFS' proposed issuance of an Incidental Harassment Authorization to the Lamont-Doherty Earth Observatory of Columbia University, in cooperation with the Pacific Gas and Electric Company. This IHA is proposed pursuant NMFS' authority under the Marine Mammal Protection Act. It would authorize L-DEO and PG & E to take marine mammals, by harassment, incidental to conducting a marine geophysical survey off the central coast of California, November to December, 2012.

NMFS' Federal Register notice explains:

    "Vessel-based, towed PAM will complement the visual monitoring program, when practicable. Visual monitoring typically is not effective during periods of poor visibility or at night, and even with good visibility, is unable to detect marine mammals when they are below the surface or beyond visual range. Passive acoustical monitoring can be used in addition to visual observations to improve detection, identification, and localization of cetaceans. The passive acoustic monitoring will serve to alert visual observers (if on duty) when vocalizing cetaceans are detected."
  • Click here to read NMFS’ Federal Register notice of proposed IHA
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