RRS Challenger CH4/85

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS Challenger (74CH)
Cruise identifierCH4/85
Cruise period1985-05-02 — 1985-05-16
Port of departureDunstaffnage, United Kingdom
Port of returnOban, United Kingdom
ObjectivesThe objectives of this cruise were:
(1) To make CTD transects across the shelf between the Mull of Galloway and the Butt of Lewis, with radiocaesium water sampling. Accomplished.
(2) To check out North Channel current meter moorings and take any necessary action. Moorings in good condition so no action taken.
(3) To deploy an electromagnetic current meter at site S off SE Isaly for the duration of the cruise. Deployment done but problems with EMCM mooring configuration.
(4) To service mooring Y (Tiree Passage) and recover a UCNW shelf mooring. Accomplished.
(5) To work the Rockall via Anton Dohrn Seamount (Ellett Line) CTD section. Accomplished.
(6) To work a grid of CTD stations in the Firth of Clyde and Kilbrannan Sound. Accomplished.
Chief scientistDavid J Ellett (Scottish Marine Biological Association)
Cruise reportRRS Challenger CH4/85 cruise report ch4_85.pdf (0.21 MB) 
Ocean/sea areas 
GeneralInner Seas off the West Coast of Scotland
Irish Sea and St. George's Channel
North East Atlantic Ocean (limit 40W)
SpecificNorth Channel; Hebridean Seas; Rockall; Firth of Clyde
Track chartsRRS Challenger CH4/85 cruise track — trk3202.html RRS Challenger CH4/85 cruise track — trk3202a.html
Physical oceanography 
Water bottle stationsQuantity: number of stations = 204
Description: 199 bottom
CTD stationsQuantity: number of stations = 199
Current metersQuantity: number of recoveries = 11
Description: 11 recovered;3 days-3,5 months
Chemical oceanography 
RadioactivityQuantity: number of samples = 70
Description: water samples for radio-caesium analysis.