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RRS Challenger CH7/80

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS Challenger (74CH)
Cruise identifierCH7/80
Cruise period1980-04-21 — 1980-05-06
StatusCompleted
Port of departureArdrossan, United Kingdom
Port of returnArdrossan, United Kingdom
PurposeResearch
ObjectivesThe objectives of this cruise were:
(1) To service current meter moorings at SMBA stations F, M (deep water) and R (shelf edge). Accomplished.
(2) To service IOS moorings at four stations in the northern Rockall Channel. Accomplished..
(3) To work the Rockall via Anton Dohrn Seamount (Ellett Line) CTD section plus additional CTD sections as possible within the time available. Anton Dohrn (Ellett Line) section was worked but no time was available for any others.
(4) Deploy an IOS experimental long duration (12-month) mooring. Accomplished.
(5) Deploy an IOS Bidston tide gauge on the Anton Dohrn section. Accomplished.
(6) Collect large volume surface water samples for radiocaesium analysis with CTD profiles on the sampling stations. Accomplished with CTD profiles on one of the ten stations.
(7) Search for current meter moorings lost during the previous winter. Moorings located, but could not be recovered.
(8) Deploy a current meter and corrosion monitoring experiment off the west coast of South Uist. Accomplished.
Chief scientistDavid J Ellett (Scottish Marine Biological Association)
Cruise reportRRS Challenger CH7/80 cruise report ch7_80.pdf (0.25 MB) 
Ocean/sea areas 
GeneralInner Seas off the West Coast of Scotland
North East Atlantic Ocean (limit 40W)
SpecificN.E. Atlantic/ Rockall Channel/ Scottish Shelf
Track chartsRRS Challenger CH7/80 cruise track — ch7_80trk.pdf (0.34 MB) 
Measurements 
Physical oceanography 
Water bottle stationsQuantity: number of stations = 30
Description: T surface only
CTD stationsQuantity: number of stations = 21
Description: noisy salinity
Current metersQuantity: number of deployments = 16
Description: 60 days;4x137 days;8x246 days
Sea level (inc. bot. press., inverted echosounder)Quantity: number of deployments = 1
Description: IOS Bidston tide gauge
Other physical oceanographic measurements
Chemical oceanography 
RadioactivityQuantity: number of samples = 10
Description: water samples taken for radio-caesium determination.