RV Clione CLI4/81

Cruise summary report

Cruise Info. 
Ship name (ship code)RV Clione (74CN)
Cruise identifierCLI4/81
Cruise period1981-03-20 — 1981-04-01
Port of departureLowestoft, United Kingdom
Port of returnLowestoft, United Kingdom
Objectives1. To investigate an area of sea bed off Orfordness, Suffolk using side scan sonar for evidence of illegal dredging for aggregate.
2. To conduct an 'intensive' monitoring survey of the Nab disposal ground by (i) side scanning sonar for bottom morphology studies, (ii) grabbing for sediments for biological, physical, chemical and bacteriological analysis and (iii) trawling by Agassiz for chemical analysis.
3. To coduct an 'intensive' monitoring survey of the Lyme Bay disposal ground (off Exmouth) as in Aim 2 excepting a sonar survey.
4. To conduct a 'routine' monitoring survey of the Barrow Deep sewage sludge disposal ground by (i) grab sampling for sediments from a limited number of stations for physical and chemical analysis and (ii) trawling for fish for chemical analysis.
Additional Aim (not on programme). To obtain samples of dumped spoil from the vicinity of Roughs Tower dumping ground.
Chief scientistMichael S Rolfe (Ministry of Agriculture, Fisheries and Food Burnham Laboratory)
Cruise reportRV Clione CLI4/81 cruise report clione4_81.pdf (0.12 MB) 
Ocean/sea areas 
GeneralNorth Sea
Irish Sea and St. George's Channel
SpecificS. North Sea/ English Channel
Track chartsRV Clione CLI4/81 cruise track — trk2656a.html RV Clione CLI4/81 cruise track — trk2656b.html RV Clione CLI4/81 cruise track — trk2656c.html
Biology and fisheries 
Demersal fishQuantity: number of hauls = 3
Description: Granton trawls.
Geology and geophysics 
DredgeQuantity: number of deployments = 5
Description: Forster anchor dredge.
GrabQuantity: number of stations = 97
Long/short range side scan sonarQuantity: number of hauls = 80
Description: side scan sonar.