Cruise inventory

FRV Scotia 0506S

Cruise summary report

Cruise Info. 
Ship name (ship code)FRV Scotia (748S)
Cruise identifier0506S
Cruise period2006-04-04 — 2006-04-08
Port of departureAberdeen, United Kingdom
Port of returnAberdeen, United Kingdom

1. To conduct tow trials of Acoustic platform
2. To test the function of two Dual Methot net frames
3. To test the function of the multi sampler frame and train scientific staff in its use
4. RCTV trials
5. ARIES orientation trials and holographic camera trials
6. Trials of acoustic instrumentation for monitoring gear performance
7. Swath bathymetry survey and training
8. Monitoring performance of acoustic systems
9. Testing shipboard instrumentation


Scotia sailed from Aberdeen at 0900 on Tuesday 4 April in blustery weather and heavy swell and made for deep water about two hours distant from Aberdeen where she commenced test deployment of the plankton winch system. Control problems with both the plankton and hydro winches were identified and the chief engineer decided that the plankton winch was too dangerous to use, due to the lack of fine control. Engineers in Norway were contacted to see if a solution could be found.

The problems with the Hydro winch meant the launching the acoustic platform was made a little more difficult, but it was eventually launched using the container crane and its integral winch. The platform was towed north at full ship's speed, without incident, in very poor conditions and was eventually recovered at 1800.

A swathe bathymetry grid was completed overnight and in the early hours of Wednesday morning. This allowed FRS staff to be trained in the use of the system - however problems in calibrating the computer meant that it was not entirely successful.

Test deployments were made with the new RCTV system on Wednesday morning and test data was acquired, before Scotia broke off at 1100 and made passage to Peterhead to drop off Nick Jacob and pick up Matt Geldart. The change over of staff was completed by 1520 and Scotia made for the Southern deeps to continue RCTV trials.

The potential of using a remote control box on the plankton winch to see if this offered
Chief scientistJohn Dunn (Fisheries Research Services Aberdeen Marine Laboratory)
Coordinating bodyFRS
Cruise reportFRV Scotia 0506S cruise report 0506s.pdf — access key 'C' (0.03 MB) 
Ocean/sea areas 
GeneralNorth Sea
SpecificNorth Sea and Moray Firth
Biology and fisheries 
Gear researchDescription: A number of tow trials took place during the cruise. No. of trials not noted.
Gear researchDescription: Swathe bathymetry and acoustic trials took place at period throughout the cruise. No. of trials not noted.
Gear researchDescription: Dual Methot, multisampler frame and RCTV trials took place during the cruise. No. of trials not noted.