Development of a Deep Water High Speed Retrievable Instrument Sledge

OVER THE LAST TWO YEARS STUDIES HAVE BEEM UNDERTAKEN TO DEVELOP AN ACOUSTIC LOW FREQUENCY TRANSMITTER CAPABLE OF TRANSMITTING DATA FROM SPECIALIZED SENSORS EMBEDDED UP TO 50 M IN OCEANIC SEDIMENTARY FORMATIONS IN WATER DEPTH OF 5 - 6 KM. DUE TO THE EXTREME CONDITIONS OF EMPLOYEMENT OF THIS INSTRUMENTATION, HIGH IMPACT VELOCITIES (200 KM/H), LARGE DECELERATIONS (>10 G) AND HIGH AMBIENT PRESSURES (ABOUT 600 BARS), PROBLEMS WERE ENCOUNTERED DURING INITIAL TESTS RESULTING IN THE LOSS OF A NUMBER OF UNITS. IN ORDER TO PHYSICALLY RECOVER THE INSTRUMENTATION FOR SUBSEQUENT INSPECTION, THE JOINT RESEARCH CENTRE DESIGNED AND CONSTRUCTED A DEEP WATER HIGH SPEED RETRIEVABLE INSTRUMENT SLEDGE. THE DEVELOPMENT OF THE SLEDGE AND THE RESULTS OF CARRIED OUT ON THE M.V. TYRO ARE REPORTED IN THE PRESENT PAPER

JAMET Michel; 

1995-03-15

JRC5108

https://publications.jrc.ec.europa.eu/repository/handle/JRC5108,