FRV Mara 5/79
Cruise summary report
|Ship name (ship code)||FRV Mara (74MR)|
|Cruise period||1979-06-05 — 1979-06-29|
|Objectives||1. To measure sand clouds generated by both polyvalent and Vee boards in order to compare with those already made with rectangular flat and cambered boards during 1978.
2. To make direct observations on the behaviour of sand clouds generated by polyvalent boards fitted with and without weights.
3. To make direct observations and record, using television, the behaviour of fish in the vicinity of the spreading wires and sand clouds.
4. Measure the turbidity of the sand clouds generated by various trawl boards using a newly developed instrument.
|Chief scientist||John Main (Department of Agriculture and Fisheries for Scotland Aberdeen Marine Laboratory)|
|Cruise report||(0.10 MB)|
|Transparency (eg transmissometer)|
|Biology and fisheries|