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RRS Challenger CH7A/82

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS Challenger (74CH)
Cruise identifierCH7A/82
Cruise period1982-04-26 — 1982-05-05
StatusCompleted
Port of departureArdrossan, United Kingdom
Port of returnArdrossan, United Kingdom
PurposeResearch
ObjectivesThe objectives of this cruise were:
(1) To service or deploy current meter moorings on 6 SMBA stations, including the long-term stations F, M and R. Four stations turned around, one (F) recovered but not re-laid.
(2) To deploy and IOS Bidston tide gauge at 57° 20 min N, 9° 54 min W. Accomplished.
(3) To work the Rockall via Anton Dohrn Seamount (Ellett Line) and other CTD sections. Worked as far as station F (between the seamount and Rockall).
(4) To recover fouling mooring from west of South Uist. Not done due to weather.
(5) To collect large-volume water samples for radiocaesium analysis with CTD profiles on stations. Accomplished.
(6) To measure chlorophyll concentrations on the shelf and over the shelf edge. Accomplished by bottle profiles and continuous underway fluorometer.
(7) To work CTD sections in the Sea of the Hebrides. No time available.
Chief scientistRoy Bowers (Scottish Marine Biological Association)
Cruise reportRRS Challenger CH7A/82 cruise report ch7_82.pdf (0.29 MB) 
Ocean/sea areas 
GeneralNorth East Atlantic Ocean (limit 40W)
SpecificN. Atlantic Ocean
Track chartsRRS Challenger CH7A/82 cruise track — trk2749.html
Measurements 
Physical oceanography 
Water bottle stationsDescription: surface only
CTD stationsQuantity: number of stations = 29
Description: noisy salinity
Current metersDescription: 11 c.m.deployed;11 c.m.recovered;85 days
Sea level (inc. bot. press., inverted echosounder)Quantity: number of deployments = 1
Description: tide gauge laid
Biology and fisheries 
Phytoplankton pigs (eg chlorophyll, fluorescence)Description: chlorophyll(cont.surface recording)
Other biological/fisheries measurementQuantity: number of stations = 2
Description: borers and foulers
Other biological/fisheries measurementQuantity: number of stations = 2
Description: attached plants and algae