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Summary for Field Activity Number 1976-001-FA

Area of Operations: Middle Atlantic Bight, United States, North America, North Atlantic

Dates: January 14, 1976 to January 17, 1976

Objectives: The objective of the SASSAFRASS cruise was to recover three bottom instrument packages deployed on the mid-Atlantic continental shelf.

Type of Activity: Mooring work

Information to be derived: Time series data

Summary: The SASSAFRASS was kindly made available to USGS by the U.S. Coast Guard for the recovery. One of the packages was recovered (Tripod JERRY). Tripods CINDY and DEBBIE were located with the AMF range bearing system, but the primary recovery systems failed. In the case of CINDY, the recovery balls released and were recovered, but the recovery line was severed. Difficulty was encountered setting CINDY during rough weather, and the severed line was expected. Extensive grappling efforts were made to recover CINDY; the tripod was hooked but was lost in lifting off the bottom. Time did not allow further grappling. In the case of tripod DEBBIE, the release activated, but no balls were observed at the surface; the failure was probably due to a fouled rope canister. The tripod was upright with one month additional data capacity remaining, and thus no effort was made to grapple until better grappling gear and additional time were available. Further attempts to recover CINDY and DEBBIE are planned. Working days: 1. Total ship track: 230 nm (414 km). Tripod recovered: 1 (#106 JERRY deployed FA 75032 ATLANTIC TWIN Dec. 10-12, 1975).

USGS Project Number: EA-PO

Contact: Brad Butman (bbutman@usgs.gov)

Map for Area of Operations :

Map of field activity boundary.

Platform Info:
SASSAFRASS
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