Cruise inventory

FRV Clupea 0796C

Cruise summary report

Cruise Info. 
Ship name (ship code)FRV Clupea (74CU)
Cruise identifier0796C
Cruise period1996-04-26 — 1996-05-17
StatusCompleted
Port of departureFraserburgh, United Kingdom
Port of returnArdrossan, United Kingdom
PurposeResearch
Objectives1. To recover current meter moorings from two locations in the North Channel, deployed during FRV Clupea Cruise 0596C.
2. To map the seabed bathymetry and sediment types in the Beaufort's Dyke explosives disposal site, and in adjacent areas in the North Channel, Firth of Clyde and Irish Sea, using RoxAnn.
3. To undertake a side-scan sonar survey of the Beaufort's Dyke explosives disposal site survey area, to determine the distribution of man-made debris on the surface of the sea bed.
4. To undertake a magnetometer survey of the Beaufort's Dyke explosives disposal site survey area, to complement the side-scan sonar investigations.
5. To collect seabed sediment samples from selected locations within the Beaufort's Dyke explosives disposal site survey area, and from dredge spoil disposal sites in the Irish Sea, for particle size, chemical and biological (macrobenthic infauna) analyses.
6. To undertake underwater television studies in the vicinity of the current meter mooring locations, to confirm the suitability of the area for the establishment of a dredge spoil disposal site.
7. To undertake underwater television studies at selected near-shore locations within the Beaufort's Dyke explosives disposal site survey area, to complement the side-scan sonar investigations.
8. To undertake a trawl survey in the vicinity of the current meter mooring locations, to confirm the suitability of the area for the establishment of a dredge spoil disposal site.
9. To undertake trawl surveys at the southern end of the North Channel and in the Irish Sea, to collect samples of representative species for chemical analysis.
Chief scientistDerek Saward (Scottish Office Agriculture Environment and Fisheries Department Aberdeen Marine Laboratory)
Cruise reportFRV Clupea 0796C cruise report cl7_96.pdf — access key 'C' (0.17 MB) 
Ocean/sea areas 
GeneralInner Seas off the West Coast of Scotland
Irish Sea and St. George's Channel
North East Atlantic Ocean (limit 40W)
SpecificNE Atlantic, North Channel, Beauforts Dyke, Firth of Clyde, Irish Sea
Measurements 
Contamination 
Trace metalsQuantity: number of hauls = 5
Description: Trawl hauls
Biology and fisheries 
Demersal fishQuantity: number of hauls = 5
Description: Trawl hauls
CrustaceansQuantity: number of hauls = 1
Description: Nephrops.
Geology and geophysics 
GrabQuantity: number of samples = 186
Description: Day grabs
Long/short range side scan sonarQuantity: activity duration in days = 9
Description: Side scan sonar
Magnetic measurementsQuantity: activity duration in days = 11
Description: magnetometer survey
Other geological/geophysical measurementsQuantity: number of deployments = 29
Description: Sites underwater TV survey
Other geological/geophysical measurementsQuantity: activity duration in days = 9
Description: RoxAnn survey
Moorings, landers, buoys 
Physical oceanography 
Current meters55° 1' 0" N  5° 13' 59" W — Recovered 3 ACM 28/4/96