RRS Challenger CH6B/81
Cruise summary report
| Cruise Info. | |
| Ship name (ship code) | RRS Challenger (74CH) |
| Cruise identifier | CH6B/81 |
| Cruise period | 1981-04-16 — 1981-04-25 |
| Status | Completed |
| Port of departure | Stornoway, United Kingdom |
| Port of return | Ardrossan, United Kingdom |
| Purpose | Research |
| Objectives | The objectives of this cruise were:
(1) To service the IOS current meter moorings NE of Rockall (I1-I4) and retrieve and experimental mooring deployed at 56° 49 min N, 9° 16 min W. Accomplished. (2) To re-lay the corrosion potential current meter mooring off South Uist. Accomplished. (3) To measure chlorophyll concentrations over the shelf and shelf-edge. Accomplished. (4) To work CTD sections across the shelf and shelf-edge. Five sections were worked from the full Rockall via Anton Dohrn Seamount (Ellett Line) section in the south northwards to a section from off the Butt of Lewis to 60N, 10W. |
| Chief scientist | Roy Bowers (Scottish Marine Biological Association) |
| Cruise report |  (0.25 MB) |
| Ocean/sea areas | |
| General | Inner Seas off the West Coast of Scotland North East Atlantic Ocean (limit 40W) |
| Specific | Rockall Channel/ Scottish Cont. Shelf |
| Track charts |  |
| Measurements | |
| Physical oceanography | |
| Surface measurements underway (T,S) | |
| Water bottle stations | Description: S surface only |
| CTD stations | Quantity: number of stations = 58 |
| Current meters | Quantity: number of stations = 4 Description: ios stations;4 moorings with 11 c.m.recovered;4 deployed;195 days |
| Other physical oceanographic measurements | Quantity: number of deployments = 1 Description: corrosion potential c.m.deployed |
| Chemical oceanography | |
| Oxygen | |
| Biology and fisheries | |
| Phytoplankton pigs (eg chlorophyll, fluorescence) | Quantity: number of samples = 32 Description: plus continuous surface chlorophyll measurements throughout the cruise |