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RRS Challenger CH8/85

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS Challenger (74CH)
Cruise identifierCH8/85
Cruise period1985-08-14 — 1985-08-28
StatusCompleted
Port of departureArdrossan, United Kingdom
Port of returnDunstaffnage, United Kingdom
PurposeResearch
Objectives1. To make CTD transects across the shelf between the Mull of Galloway and Cape Wrath, and to collect radiocaesium samples for analysis by Glasgow University and the Fisheries Radiobiological Laboratory, Lowestoft, on certain transects.
2. To collect bottom cores in the North Channel and Sea of the Hebrides for the Fisheries Radiobiological Laboratory, Lowestoft.
3. To repeat a CTD survey of the Firth of Clyde and Kilbrannan Soung.
4. To service SMBA mooring Y in the Tiree Passage, and to deploy a deep mooring on the eastern flank of Anton Dohrn Seamount for recovery in December or March.
5. To work the Anton Dohrn Seamount (Ellett Line) CTD section.
6. To make instrument tests of the Neil Brown 'Smart' CTD and the Bissett-Berman CTDs in a variety of environments, including the Norwegian Sea deep water.
7. To test the suitability of the Interocean S4 current meter for obtaining depth profiles of currents at the shelf edges.
8. To observe seabirds around the Hebrides for the Nature Conservancy Council Seabirds at Sea Programme.
Chief scientistDavid T Meldrum (Scottish Marine Biological Association)
Cruise reportRRS Challenger CH8/85 cruise report ch8_85.pdf (0.22 MB) 
Ocean/sea areas 
GeneralInner Seas off the West Coast of Scotland
North East Atlantic Ocean (limit 40W)
SpecificRockall Channel/ Scottish Cont. Shelf/ North Channel
Track chartsRRS Challenger CH8/85 cruise track — trk3336.html RRS Challenger CH8/85 cruise track — trk3336a.html
Measurements 
Physical oceanography 
Water bottle stationsQuantity: number of stations = 177
CTD stationsQuantity: number of stations = 177
Description: 3 without S
Current metersQuantity: number of stations = 1
Description: 4 deployed;3 months
Chemical oceanography 
RadioactivityQuantity: number of samples = 62
Description: water samples for radiocaesium analysis.
Biology and fisheries 
BirdsQuantity: number of stations = 25
Description: observed for the identification and distribution of seabirds.
Geology and geophysics 
Core - soft bottomQuantity: number of cores = 10