RRS Challenger CH12/76

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS Challenger (74CH)
Cruise identifierCH12/76
Cruise period1976-08-04 — 1976-08-15
Port of departureGreenock, United Kingdom
Port of returnLiverpool, United Kingdom
ObjectivesThe objectives of this cruise were:
(1) Re-lay the current meter mooring at 57N, 9W. Accomplished.
(2) Work the Rockall via Anton Dohrn Seamount (Ellett Line) STD section. Accomplished.
(3) Lay three IOS deep moorings in the NW sector of the Rockall Channel. Two successfully laid, but one lost due to a deployment accident.
(4) Batfish temperature and salinity survey in the vicinity of the Anton Dohrn Seamount, Rockall, Lousy Bank, Rosemary Bank area. Accomplished.
(5) Lay and recover additional short-term shelf-edge current meter moorings. Accomplished.
(6) Collect large-volume surface water samples on the Scottish shelf for radiocaesium analysis. Accomplished with STD profiles on all but two stations.
Chief scientistDavid J Ellett (Scottish Marine Biological Association)
Cruise reportRRS Challenger CH12/76 cruise report ch12_76.pdf (0.53 MB) 
Ocean/sea areas 
GeneralNorth East Atlantic Ocean (limit 40W)
Track chartsRRS Challenger CH12/76 cruise track — trk1796.html
Physical oceanography 
Surface measurements underway (T,S)Quantity: number of measurements = 57
Description: 24 T surface 33 S surface
CTD stationsQuantity: number of stations = 28
Subsurface temperature and salinity measurementsQuantity: number of deployments = 26
Description: (batfish,26 tows)
Current metersQuantity: number of stations = 3
Description: 7x7,5 days
Chemical oceanography 
IsotopesQuantity: number of stations = 10
Description: water samples for radio-caesium analysis.
Routine standard measurementsDescription: (syn.hours)
Geology and geophysics 
Multi-beam echosounding