Acoustic Thermometry of Ocean Climate (ATOC): Pioneer Seamount Source Installation.
1996
Howe, Bruce M.
The ATOC acoustic source was installed on Pioneer Seamount during October and November 1995. Three vessels were used for this work. On 5 October, M/V McGaw laid 3 nmi of cable at Pillar Point, California. The cable is terminated at the Pillar Point Air Force Station. On 14 October, a survey of the proposed source site on Pioneer Seamount was conducted using the U.S. Navy's Deep Submergence Vehicle Sea Cliff (DSV 4) deployed from MW Laney Chouest. This survey determined the precise location for tne source and deployed acoustic transponders for relocating the site. The source deployment using M/V Independence was done in four steps during 24 October to 3 November. One length of deep stowed cable was recovered off Point Sur. The source was deployed on 28 October, and this first length of cable laid toward shore. A second piece of deep stowed cable was recovered off San Simeon. It then was spliced to the first piece, laid to shore, and spliced to the cable at Pillar Point. Engineering test transmissions were made after deployment of the source to ensure that it was functioning correctly. The best estimate for the position of the center of the acoustic source is 37deg2O.5550'N, 123deg26.7117'W at 938.7 m depth.
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