Abstract
Data were collected to depths of 7500 m during two dives in July 1967. Sound speeds were measured with two NUS TR-4 velocimeters. Corresponding temperatures were determined with a Hewlett-Packard oceanographic sensor, a Ramsay Engineering MK VIA deep sea probe, and reversing thermometers. Pressure was determined with a Fairchild strain gauge, reversing thermometers, and a precision pressure gauge. Iron shot fouled the water-sampling system; however, data on salinity are available from previous dives. Profiles were obtained in portions of the water column and measurements of all variables were conducted at the bottom. The data were recorded as frequency on a seven-channel tape recorder during the descent and at the bottom. A reference crystal frequency was simultaneously recorded for control. The frequencies were also counted while on the bottom.
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