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Thursday, May 20, 2021, 7:00 PM - 8:30 PM

The Santa Cruz Acoustic Range Facility (SCARF) was designed, built, installed, operated, and maintained by General Motors Defense Research Lab, Sea Operations from 1966 - 1982. The U.S. Navy took ownership of the range in 1982 at which time it was operated and maintained by Goleta-based MariPro, Inc. until it was decommissioned in 1990. On Thursday, May 20 at 7pm, three men from Santa Barbara--Dave Schiefen, Richard Hegeman and Lloyd Sorensen--who were all involved with the SCARF program from day one until its decommissioning, will present a narrated slide show covering the history, development installation, and operation of the SCARF facility. What was Scarf and What Kind of Work Did It Do? The onshore facility was located on the south side of Santa Cruz Island on land leased from the Santa Cruz Island Company. SCARF supported hundreds of U.S. Navy development and test programs, many of them classified. Submarines protecting our national security must deploy with secrecy and operate undetected. To provide stealth during a mission, accurate measurement of sounds radiated by a submarine is essential. Noise generated from a submarine radiates from speed, depth, power plant operations, propeller cavitation and hydrodynamic noise created by hull vibrations. Using sub-sea hydrophones, the primary SCARF mission was to support radiated noise measurement for underway-surface ships and submarines at all speeds and depths. Bottom-mounted sensor arrays in 4000 feet of water tracked submarine and surface ship movements over the range. As submarines transited by the vertical string of hydrophones, noise measurement information was gathered. Underwater cables transmitted the information to the shore station, and an Underwater Communications System (UQC) allowed the shore station to communicate with the submarines. This monitoring was vital in recognizing submarines' vulnerabilities and recommending corrective actions to reduce radiated noise.

Cost: Free, but registration is required

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113 Harbor Way
Santa Barbara, CA 93109

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