Cruise inventory

RRS Charles Darwin CD55

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS Charles Darwin (74AB)
Cruise identifierCD55
Cruise period1991-01-06 — 1991-02-05
StatusCompleted
Port of departureDakar, Senegal
Port of returnDakar, Senegal
PurposeResearch
ObjectivesThe principal objective of the cruise was the study of the deep crustal structure across the continental-ocean transition off Ghana where the major equatorial Romanche Fracture Zone shapes the continental slope.
Chief scientistRobert B Whitmarsh (Institute of Oceanographic Sciences Deacon Laboratory)
Cruise reportRRS Charles Darwin CD55 cruise report cd55.pdf — access key 'C' (1.18 MB) 
Ocean/sea areas 
GeneralGulf of Guinea
SpecificContinental shelf, slope and rise off Ghana
Track chartsRRS Charles Darwin CD55 cruise track — trk3675.html
Measurements 
Geology and geophysics 
Single channel seismic reflectionQuantity: track kilometres = 1668
Description: Single channel, mostly 2x300 cubic ins guns
Seismic refractionQuantity: number of deployments = 1
Description: 00010.0W 03 31.6N 002 30.9W
Seismic refractionQuantity: number of deployments = 1
Description: 00009.7W 04 13.0N 002 30.2W
Seismic refractionQuantity: track kilometres = 1080
Description: 9 lines 50' to 75' long
Seismic refractionQuantity: number of deployments = 1
Description: 00018.5W Ocean-bottom seismographs
Seismic refractionQuantity: number of deployments = 1
Description: 00104.5W 04 30.6N 000 25.3W
Seismic refractionQuantity: number of deployments = 1
Description: 00010.0W 04 34.3N 000 29.5W
Seismic refractionQuantity: number of deployments = 1
Description: 00034.4W 04 38.3N 000 34.1W
Seismic refractionQuantity: number of deployments = 1
Description: 00050.5W 05 00.6N 000 56.1W
Seismic refractionQuantity: number of deployments = 1
Description: 00029.9W 03 13.0N 002 24.0W
Seismic refractionQuantity: number of deployments = 1
Description: 00043.1W 03 12.0N 003 08.8W
Seismic refractionQuantity: number of deployments = 1
Description: 00036.5W 04 04.1N 002 56.0W
Seismic refractionQuantity: number of deployments = 1
Description: 0437.5N 00003.4W
Seismic refractionQuantity: number of deployments = 1
Description: 0404.0N 00030.5W
Seismic refractionQuantity: number of deployments = 1
Description: 0431.6N 00002.0E
Seismic refractionQuantity: number of deployments = 1
Description: 00042.1W also at 04 09.9N 000 06.4W
Seismic refractionQuantity: number of deployments = 1
Description: 00059.4W 04 45.9N 000 42.0W
Gravity measurementsQuantity: track kilometres = 5093
Magnetic measurementsQuantity: track kilometres = 1666.8