RRS Challenger CH13/77

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS Challenger (74CH)
Cruise identifierCH13/77
Cruise period1977-08-20 — 1977-09-03
Port of departureArdrossan, United Kingdom
Port of returnArdrossan, United Kingdom
ObjectivesCruise objectives were.
(1) Service the current meter mooring at 57N, 9W and recover another NW of St Kilda. Accomplished.
(2) STD time series at apices of 15km triangles centred on the JASIN moorings and Anton Dohrn Station F. Completed for Station F and two of the moorings plus five of six profiles on a third mooring before bad weather set in. One mooring not worked.
(3) Make shear measurements with the Royal Australian Navy Gradient Richardson number meter. Accomplished.
(4) Work the Anton Dohrn Seamount (Ellett Line) STD section. Accomplished.
(5) Work a series of 25-hour STD time series stations to 1200m depth. Not possible due to weather.
(6) Record along-track temperature and salinity using the STD in a pumped flow on-deck with 10-minute bathymetric depth soundings. Accomplished.
(7) Repeat the shelf-edge STD stations worked on RRS Challenger cruise 10/77. One of the shelf-edge sections (Barra Head) worked.
(8) Collect large-volume surface water samples for radiocaesium analysis. Accomplished with STD profiles.
Chief scientistDavid J Ellett (Scottish Marine Biological Association)
Cruise reportRRS Challenger CH13/77 cruise report ch13_77.pdf (0.24 MB) 
Ocean/sea areas 
GeneralNorth East Atlantic Ocean (limit 40W)
Track chartsRRS Challenger CH13/77 cruise track — trk2125.html
Physical oceanography 
Surface measurements underway (T,S)
Water bottle stationsQuantity: number of stations = 42
Description: S surface 35 T surface
CTD stationsQuantity: number of stations = 52
Current metersQuantity: number of deployments = 1
Description: 48 days
Other physical oceanographic measurementsQuantity: number of measurements = 3
Description: gradient(Richardson number meter)
Chemical oceanography 
IsotopesQuantity: number of samples = 6
Geology and geophysics 
Bottom photographyDescription: motion picture