Cruise inventory

FRV Clupea 0698C

Cruise summary report

Cruise Info. 
Ship name (ship code)FRV Clupea (74CU)
Cruise identifier0698C
Cruise period1998-04-14 — 1998-04-30
StatusCompleted
Port of departureFraserburgh, United Kingdom
Port of returnFraserburgh, United Kingdom
PurposeResearch
Objectives1. To undertake grab surveys to collect seabed sediment samples from the Bell Rock and St Abb's Head sewage sludge disposal sites, and from areas adjacent to both sites, for microbiological analysis on FRV Clupea, and for physical, chemical and biological analyses in the Marine Laboratory, Aberdeen (MLA).
2. To undertake Agassiz trawl surveys to collect benthic epifauna samples from the areas outlined above, for identification and enumeration of the predominant species and items of litter on FRV Clupea.
3. To undertake underwater television surveys to investigate the benthic epifauna in the areas outlined above, for identification and enumeration of the predominant species in MLA.
4. To map the seabed bathymetry and sediment types in the Middle Bank area of the Firth of Forth, using RoxAnn.
5. To undertake a side-scan sonar survey in the Middle Bank area, to determine the nature and distribution of significant seabed features (eg natural outcrops of rock).
6. To undertake a transmissometer survey in the Middle Bank area, to investigate the levels of turbidity.
7. To collect seawater samples from the Middle Bank area, for measurement of suspended solids levels and phytoplankton analysis in MLA.
8. To undertake grab and corer surveys to collect seabed sediment samples from the Middle Bank area, for physical, chemical and biological analyses in MLA.
9. To undertake an Agassiz trawl survey to collect benthic epifauna samples from the Middle Bank area, for identification and enumeration of the predominant species on FRV Clupea.
10. To undertake an underwater television survey to investigate the benthic epifauna in the Middle Bank area, for identification and enumeration of the predominant species in MLA.
Chief scientistDerek Saward (Fisheries Research Services Aberdeen Marine Laboratory)
Cruise reportFRV Clupea 0698C cruise report cl6_98.pdf — access key 'C' (0.44 MB) 
Ocean/sea areas 
GeneralNorth Sea
SpecificBell Rock, St Abb's Head, Middle Bank area of Firth of Forth
Measurements 
Physical oceanography 
Transparency (eg transmissometer)Quantity: number of stations = 17
Contamination 
Suspended matterQuantity: number of samples = 57
Description: Duplicate water samples collected for suspended solids measurements.
Biology and fisheries 
Demersal fishQuantity: number of hauls = 18
Description: Agassiz trawl.
Acoustic reflection on marine organisms.Description: RoxAnn survey of the Middle Bank survey area.
Geology and geophysics 
GrabQuantity: number of stations = 129
Description: Day grabs.
Core - soft bottomQuantity: number of cores = 17
Description: Gravity cores do determine the depth of any superficial silt of clay deposits.
Bottom photographyQuantity: number of deployments = 44
Description: Towed underwater television.
Long/short range side scan sonarDescription: Side-scan survey was completed at the Middle Bank.
Other geological/geophysical measurementsDescription: RoxAnn survey of the Middle Bank survey area.