OCEANOGRAPHIC AND UNDERWATER ACOUSTICS RESEARCH.

• Other Authors: WOODS HOLE OCEANOGRAPHIC INSTITUTION MASS
• Format: Text
• Language: English
• Published: 1966
• Subjects: Physical and Dynamic Oceanography; Acoustics; (*UNDERWATER SOUND; SCIENTIFIC RESEARCH); (*OCEANOGRAPHY; UNDERWATER SOUND EQUIPMENT; MARINE GEOPHYSICS; OCEAN BOTTOM SAMPLING; Indian; North Atlantic
• Online Access: http://www.dtic.mil/docs/citations/AD0639589; http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0639589

The objective of the contract is to provide by research the broad environmental background needed for the design, developmental test, and operational guide-lines of underwater devices of the Navy. The contract work consists of a broad research program in oceanic acoustics, physical oceanography, and sea floor properties. Two geological and geophysical cruises of the R/V CHAIN were mounted in the Caribbean Sea and in the western North Atlantic Ocean. Precision echo soundings, measurements of gravity and magnetic field intensity, continuous seismic profiles using the spark source, bottom samples by coring and dredging, and bottom photographs were taken. Analyses of geophysical and geological data from the North Atlantic Ocean, the Indian Ocean, and the Caribbean Sea have been completed or are underway. Theoretical and experimental work on hydrophone arrays for receiving underwater and seismic reflection signals has been continued. A towed quartz thermometer and inverted echo-sounder system for recording temperature-depth profiles has been developed. Development continues on a towed thermistor-string system for recording a temperature profile of the upper 500 m of seawater. (Author) See also AD-618 485.