FRV Mara 5/79

Cruise summary report

Cruise Info. 
Ship name (ship code)FRV Mara (74MR)
Cruise identifier5/79
Cruise period1979-06-05 — 1979-06-29
Objectives1. 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 scientistJohn Main (Department of Agriculture and Fisheries for Scotland Aberdeen Marine Laboratory)
Cruise reportFRV Mara 5/79 cruise report mara5_79.pdf (0.10 MB) 
Ocean/sea areas 
GeneralNorth Sea
Physical oceanography 
Transparency (eg transmissometer)
Biology and fisheries 
Gear research