RRS Challenger CH71A

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS Challenger (74CH)
Cruise identifierCH71A
Cruise period1990-08-29 — 1990-09-05
Port of departureAberdeen, United Kingdom
Port of returnOban, United Kingdom
1. To work the CTD stations of the Anton Dohrn Seamount section between Rockall and the shelf-edge.
2. To collect large-volume water samples between the shelf-edge and the Sound of Mull (Ellett Line).
3. To redeploy the DML current meter in the Tiree Passage.
Chief scientistDavid J Ellett (Dunstaffnage Marine Laboratory)
Cruise reportRRS Challenger CH71A cruise report ch71_90.pdf (0.41 MB) 
Ocean/sea areas 
GeneralInner Seas off the West Coast of Scotland
North East Atlantic Ocean (limit 40W)
SpecificNW Scotland
Track chartsRRS Challenger CH71A cruise track — trk3617.html RRS Challenger CH71A cruise track — trk3617b.html
Physical oceanography 
CTD stationsQuantity: number of stations = 59
Description: 36 at Sound of Mull-Rockall Section (WOC)E & 20 at Sea of Hebrides
Current metersQuantity: number of stations = 1
Description: 2 cms deployed
Chemical oceanography 
RadioactivityQuantity: number of samples = 10
Description: Radiocaesium sampling
Biology and fisheries 
ZoobenthosQuantity: number of deployments = 4
Description: box cores - seasonal benthos studies
ZoobenthosQuantity: number of hauls = 2
Description: Agasiz trawls
ZoobenthosQuantity: number of hauls = 4
Description: epibenthic sledge
Exploratory fishingQuantity: number of hauls = 7
Description: Benthopelagic fish sampling for seasonal sampling
Geology and geophysics 
Core - soft bottomQuantity: number of cores = 9
Description: gravity cores for tephra horizons
Moorings, landers, buoys 
Physical oceanography 
Current meters56° 37' 0" N  6° 24' 0" W — Mooring laid 3 Sep,meters at 27m and 37m,sounding 47m,recovery due Dec 1990