RRS Challenger CH7A/75

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS Challenger (74CH)
Cruise identifierCH7A/75
Cruise period1975-05-01 — 1975-05-06
Port of departureGreenock, United Kingdom
Port of returnOban, United Kingdom
ObjectivesThe objectives of this cruise were:
1. Deploying a current meter mooring at 57N, 9W for the duration of the cruise. Accomplished.
2. Work an STD time series at the current meter site. Accomplished..
3. Work the Rockall via Anton Dohrn Seamount (Ellett Line) hydrographic section. Achieved as far as the deep water to the W of the Seamount.
4. Collection of shelf sediment Shipek Grab samples for Aberystwyth University. Accomplished.
5. Collection of large-volume water samples for radio-caesium measurements. Accomplished
6. Testing and development of a data logging system for STD system. Accomplished.
7. Near real-time supply of temperature profiles to the Met Office. Accomplished.
Chief scientistDavid J Ellett (Scottish Marine Biological Association)
Cruise reportRRS Challenger CH7A/75 cruise report ch7a_75.pdf (0.08 MB) 
Ocean/sea areas 
GeneralInner Seas off the West Coast of Scotland
North East Atlantic Ocean (limit 40W)
SpecificRockall Channel
Physical oceanography 
CTD stationsQuantity: number of stations = 31
Chemical oceanography 
RadioactivityQuantity: number of samples = 10
Description: Large-volume water sampes
Geology and geophysics 
GrabQuantity: number of deployments = 7
Description: Shipek Grab samples
Moorings, landers, buoys 
Physical oceanography 
Current meters57° 0' 0" N  9° 0' 0" W — Current meter deployment for cruise duration.