Cruise inventory

RRS Discovery D163

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS Discovery (74E3)
Cruise identifierD163
Cruise period1986-10-26 — 1986-11-19
Port of departureFalmouth, United Kingdom
Port of returnGibraltar, Gibraltar
ObjectivesThis cruise was the last in our DoE commissioned research programme on oceanic radioactive waste disposal. The new IOS deep-towed sidescan and profiler, TOBI, had been lost on previous cruise to GME when its glass buoyancy spheres imploded. Since January TOBI had been redesigned and rebuilt, and cruise 163 was to be its first test at sea.
The most important objectives were therefore to bring TOBI to a fully operational state; to use it to obtain data on outcrop patterns, sediment stability, and faulting in GME: and to continue the PUPPI programme, in particular trying to confirm and extend the observations of high pressure gradients near the 10 km box. Coring, seismic profiling and camera work was to be used to fill in between the TOBI and PUPPI operations, broadly continuing earlier lines of work. Finally, we were to recover a sediment trap and Bathysnap seabed camera for the IOS biology group.
Chief scientistRoger C Searle (Institute of Oceanographic Sciences Wormley Laboratory)
Cruise reportRRS Discovery D163 cruise report d163.pdf — access key 'C' (0.84 MB) 
Ocean/sea areas 
GeneralNorth East Atlantic Ocean (limit 40W)
SpecificGreat Meteor East/ Eastern N. Atlantic
Track chartsRRS Discovery D163 cruise track — trk3308.html
Biology and fisheries 
Sediment trapsQuantity: number of deployments = 1
Description: 4 traps
Geology and geophysics 
Core - soft bottomQuantity: number of cores = 2
Description: box cores
Bottom photographyQuantity: number of deployments = 2
Description: Wide Area Survey Photography,(WASP)camera system,also 1 Bathysmap seabed camera
Multi-beam echosoundingQuantity: track kilometres = 7200
Long/short range side scan sonarQuantity: activity duration in hours = 89
Description: Towed Ocean Bottom Instrument(TOBI),5 deployed,89 hours of towing
Single channel seismic reflectionQuantity: track kilometres = 3600
Description: SRP & 3.5 kHz
Magnetic measurementsQuantity: track kilometres = 1852
Other geological/geophysical measurementsQuantity: number of deployments = 4
Description: Pop-Up-Pore-Pressure Instrument(PUPPI)