Accession Number : AD0435129
Title : CABLE-TOWED OCEANOGRAPHIC INSTRUMENTATION SYSTEM DETAILED DESIGN
Descriptive Note : Technical rept.
Corporate Author : PNEUMO DYNAMICS CORP BETHESDA MD
Personal Author(s) : Gay, Jr , S M ; Walters, Francis
Report Date : Feb 1964
Pagination or Media Count : 81
Abstract : Salient features are described of a cable-towed oceanographic instrumentation system designed for the taking of sound-speed measurements simultaneously and continuously at six depths, to a maximum depth of 5,000 feet from a vessel proceeding at 7 1/4 knots. A novel housing for the sound velocimeter, designed to minimize sound-speed measurement error due to towing speed, is described. The housing is used to prevent rotation of the cable. The equations for prediction of cable rotation are derived and measurement of the rotational characteristics of a double-armored cable are reported. Description is also given of the development of the electrical signal-transmission system, which incorporates a novel low-distortion amplifier.
Descriptors : *UNDERWATER SOUND EQUIPMENT , *OCEANOGRAPHIC SHIPS , ELECTRONIC EQUIPMENT , INSTALLATION , POWER SUPPLIES , INSTRUMENTATION , UNDERWATER SOUND , TOWING CABLES , TOWED BODIES , MEASUREMENT , VELOCITY , MODULES(ELECTRONICS)
Subject Categories : Acoustics
Distribution Statement : APPROVED FOR PUBLIC RELEASE