FRV Scotia 1110S
|Ship name (ship code)||FRV Scotia (748S)|
|Cruise period||2010-09-08 — 2010-09-20|
|Port of departure||Aberdeen, United Kingdom|
|Port of return||Aberdeen, United Kingdom|
1. To undertake a nationally co-ordinated demersal trawling survey of haddock on the Rockall Plateau.
2. To deploy a CTD at each trawl station to collect temperature and salinity profiles.
3. To carry out a series of transects to map the seabed using the vessels Swathe Bathymetry system.
The primary objective of the survey is to assess the state of the haddock stock on the Rockall Plateau. Although the Rockall haddock survey has existed for a number of years, a new sampling design is currently being developed. Trawling will be carried out during the hours of daylight at randomly selected locations within the 400-metre contour. The exact locations of the trawling stations will be notified to the vessel at the commencement of the cruise. When the opportunity arises, the vessel will carry out a series of transects using the vessels Swathe Bathymetry system to map the seabed. Initially, this work will be carried out between the hours of 2000 and 0600 depending on the location of the vessel. Once the fishing survey area has been completed, further work with the Swathe Bathymetry system will be conducted at locations agreed between the cruise leader and representative of Scottish Natural Heritage.
One haul of 30 minutes duration will be made at each sampling station; trawling operations will occur in waters up to a maximum of 400 m. Daily start times for survey stations will be at approximately 0600 and continue until approximately 2000. The Scanmar system will be used to monitor wingspread, door spread and distance covered during each haul. A bottom contact sensor will be mounted on the footrope to record the distance of the trawl off the seabed.
Catches will be worked up according to the protocols for International Bottom Trawl Surveys and in line with MSS Standing Instructions.
A CTD will be deployed on the trawl at each station. The ships thermosalinograph will be operated throughout the cruise.
The Swathe Bathymetry system will be used to map the seabed at a series of locations on the Rockall Plateau with the vessel operating between 4 - 6 knots. Positions to be surveyed will be agreed by the cruise leader, representative of Scottish Natural Heritage and the vessel.
Normal contacts will be maintained with the Laboratory.
|Chief scientist||Kenneth A Coull (Marine Scotland Aberdeen Marine Laboratory)|
|Project||MFO1TA / 10066|
|General||North East Atlantic Ocean (limit 40W)|