RRS Challenger CH4/77

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS Challenger (74CH)
Cruise identifierCH4/77
Cruise period1977-02-25 — 1977-03-11
Port of departureBarry, United Kingdom
Port of returnAvonmouth, United Kingdom
ObjectivesThe objectives of this cruise were:
(1) Re-establish the shelf current meter mooring at 57N, 9W. Not possible due to bad weather.
(2) Work the Rockall via Anton Dohrn Seamount (Ellett Line) STD section. Worked except for station Q with increased spacing between stations.
(3) Work STD sections across the southern Rockall Channel and its entrance. A section of 11 stations along 52.5N between 21W and 14W and a section of 9 stations from Porcupine Bank to Rockall Bank were worked.
(4) Release a drifting buoy bearing a wave recorder and thermistor chain on the site of OWS JULIETT (52.5N, 20W). Accomplished.
(5) Collect large-volume surface water samples on the Scottish shelf for radiocaesium analysis. Accomplished with STD profiles at all but one station.
Chief scientistDavid J Ellett (Scottish Marine Biological Association)
Cruise reportRRS Challenger CH4/77 cruise report ch4_77.pdf (0.14 MB) 
Ocean/sea areas 
GeneralIrish Sea and St. George's Channel
North East Atlantic Ocean (limit 40W)
Track chartsRRS Challenger CH4/77 cruise track — trk1799.html
Physical oceanography 
Water bottle stationsQuantity: number of stations = 40
Description: S surface 15 T surface
CTD stationsQuantity: number of stations = 45
Other physical oceanographic measurementsQuantity: number of deployments = 1
Description: satellite-tracked buoy with thermistor chain and wave-recorder
Chemical oceanography 
IsotopesQuantity: number of samples = 10
Description: Cs
Routine standard measurements