RV Clione CLI13/81

Cruise summary report

Cruise Info. 
Ship name (ship code)RV Clione (74CN)
Cruise identifierCLI13/81
Cruise period1981-10-26 — 1981-11-06
Port of departureLowestoft, United Kingdom
Port of returnLowestoft, United Kingdom
Objectives1. To conduct an 'intensive' monitoring survey of the Bristol Channel disposal area (including the main and bad weather sewage sludge dumping grounds and the Swansea Bay spoil ground) by (i) side scanning sonar for bottom morphology, (ii) grabbing for biological, physical, chemical and bacteriological analysis and (iii) trawling for fish for chemical analysis in the vicinity of Swansea Bay (3-4 days).
2. To conduct a side scanning sonar and grabbing survey off Falmouth Bay with a view to the possible re-siting of the existing sewage sludge dumping ground (1-2 days).
3. To conduct a 'routine' survey of the Plymouth sewage sludge dumping ground by grabbing for sediments for physical, chemical and bateriological analysis (1-2 days).
4. To conduct a short side scanning sonar survey over the Hurst Narrows spoil ground for bottom morphological studies and discernment of dumped spoil (< 1 day).
5. To conduct a survey of the South Falls dumping ground by (i) side scanning sonar (to supplement data obtained on earlier cruises) and (ii) grabbing for sediments for biological, chemical and bacteriological analysis (2 days).
6. To collect fish for chemical analysis from the vicinity of Barrow Deep, outer Thames Estuary by trawling (1 day).
7. To deploy underwater television at dumping sites listed above as conditions permit.
Additional aims (not on programme)
8. To conduct a short side scanning sonar survey over the Dover spoil ground, collecting ground truth sediment sample as necessary.
9. Dumping at Sea Act Enforcement: Sightings of dumping vessels will be noted by My Byrne.
10. A performance assessment will be madeon a Walker Sat Nav 801 navigational system.
Chief scientistMichael S Rolfe (Ministry of Agriculture, Fisheries and Food Burnham Laboratory)
Cruise reportRV Clione CLI13/81 cruise report clione13_81.pdf (0.17 MB) 
Ocean/sea areas 
GeneralNorth Sea
Irish Sea and St. George's Channel
SpecificBristol Channel/English Channel/S. North Sea
Track chartsRV Clione CLI13/81 cruise track — trk2665.html RV Clione CLI13/81 cruise track — trk2665b.html
Biology and fisheries 
Demersal fishQuantity: number of hauls = 3
Description: Granton trawl hauls.
CrustaceansQuantity: number of stations = 6
Geology and geophysics 
GrabQuantity: number of samples = 139
Description: 0.14 square meter Day grab.
Long/short range side scan sonarQuantity: number of stations = 6
Description: side scans.
Other geological/geophysical measurementsQuantity: number of stations = 2
Description: underwater television