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Cruise inventory

RRS Discovery D90

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS Discovery (74E3)
Cruise identifierD90
Cruise period1978-01-20 — 1978-03-03
Port of departureSouth Shields, United Kingdom
Port of returnBrest, France
ObjectivesFollowing the successful use of the long-range side-scan sonar in the Rockall Trough during Cruise 84, it was planned to make a wider study of the continental margin of northwest Europe utilising the technique of producing sonograph mosaics of substantial areas. Simultaneous bathymetric, seismic reflection and gravity measurements would also be made. It was planned to concentrate the main effort of the cruise in the Southwestern Approaches and off Portugal with alternative areas to the south reserved as bad weather options.
Chief scientistDavid G Roberts (Institute of Oceanographic Sciences Wormley Laboratory)
Cruise reportRRS Discovery D90 cruise report d90.pdf — access key 'C' (0.79 MB)  RRS Discovery D90 cruise report d90_91_data_report.pdf (5.27 MB) 
Ocean/sea areas 
GeneralNorth Atlantic Ocean
Bay of Biscay
Track chartsRRS Discovery D90 cruise track — trk2081.html
Routine standard measurementsQuantity: track kilometres = 12260.24
Geology and geophysics 
Multi-beam echosoundingQuantity: track kilometres = 12260
Long/short range side scan sonarQuantity: track kilometres = 1000
Description: 36kHz
Single channel seismic reflectionQuantity: track kilometres = 10093
Seismic refractionQuantity: 3
Description: sono-buoy
Gravity measurementsQuantity: track kilometres = 11334.24
Magnetic measurementsQuantity: track kilometres = 10445.28
Other geological/geophysical measurementsQuantity: track kilometres = 9408.16
Description: profiler,35 kHz
Other geological/geophysical measurementsQuantity: track kilometres = 8797
Description: gloria side scan