RRS Challenger CH5A/76

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS Challenger (74CH)
Cruise identifierCH5A/76
Cruise period1976-03-29 — 1976-04-05
Port of departureAberdeen, United Kingdom
Port of returnDunstaffnage, United Kingdom
ObjectivesThe objectives of this cruise were:
1. Establish a current meter mooring at 57N, 9W. Accomplished.
2. Work the Rockall via Anton Dohrn Seamount (Ellett Line) hydrographic section. Partially accomplished with 5 eastenmost stations missed due to bad weather.
3. Launch a satellite-tracked buoy with thermistor chain. Abandoned due to technical problems with the buoy.
4. Work St. Kilda shelf-edge section. No time to do this due to bad weather.
5. Collection of large-volume surface water samples for radio-caesium measurements. 8 of 10 stations accomplished. STD profiles taken on sampling sites.
6. Near real-time supply of temperature profiles to the Met Office. Accomplished.
Chief scientistDavid J Ellett (Scottish Marine Biological Association)
Cruise reportRRS Challenger CH5A/76 cruise report ch5a_76.pdf (0.11 MB) 
Ocean/sea areas 
GeneralNorth East Atlantic Ocean (limit 40W)
SpecificRockall, Anton Dohrn Seamount
Track chartsRRS Challenger CH5A/76 cruise track — trk1553.html
Physical oceanography 
Water bottle stationsQuantity: number of stations = 18
Description: S surface 8 T surface
CTD stationsQuantity: number of stations = 22
Current metersQuantity: number of deployments = 1
Description: laid 1 Apr for recovery on subsequent cruise
Chemical oceanography 
RadioactivityQuantity: number of samples = 8
Description: 137Cs
Routine standard measurements