RRS Challenger CH14/74
Cruise summary report
|Ship name (ship code)||RRS Challenger (74CH)|
|Cruise period||1974-08-29 — 1974-09-21|
|Port of departure||Greenock, United Kingdom|
|Port of return||Aberdeen, United Kingdom|
|Objectives||1. To obtain grab and dredge samples for study as part of the I.O.S Wormley investigation into biogenic carbonates and sediments on the Scottish Continental Shelf from areas not covered during previous cruises and for which data was required.
2. To obtain sediment and faunal samples along the sediment transport path through the Shetland-Fair Isle-Orkney Channel and into the northern North Sea.
3. To investigate localities on the shelf and upper slope known to contain the corals Caryophillia smithii and Lophelia prolifera.
4. To obtain further side-scan sonar records to improve existing coverage on the continental shelf west and north of Scotland.
5. To obtain side-scan sonar data on the distribution and burial of iceberg plough marks in the north North Sea between 61º 31.7'N 0º 41.8'E (the south eastward limit of data from RRS John Murray in May, 1972) and 60º 37.0'N 2º 48.0'E (the westerly line obtain on RRS Discovery, Cruise 50, October 1972).
6. To obtain anchor dredge and epibenthic sledge samples from the deep station in the Rockall Trough or from Anton Dohrn Bank or from the upper stations on the Hebrides Terrace transect for Dr J.D. Gage as part of the SMBA, BABS programme.
7. To use the MS47 Transit Sonar to look for evidence of scouring or build up of sediment and evidence of sediment transport associated with some of the remaining wrecks of the German High Seas Fleet in Scapa Flow.
|Chief scientist||John B Wilson (Institute of Oceanographic Sciences Wormley Laboratory)|
|Cruise report||(0.58 MB)|
|General||North East Atlantic Ocean (limit 40W)|
|Geology and geophysics|
|Dredge||Quantity: number of deployments = 18|
|Grab||Quantity: number of samples = 184|
|Bottom photography||Quantity: number of deployments = 2|
Description: motion pictures
|Multi-beam echosounding||Quantity: track kilometres = 5445|
|Long/short range side scan sonar||Quantity: track kilometres = 4333|