Cruise inventory

FRV Mara 7/73

Cruise summary report

Cruise Info. 
Ship name (ship code)FRV Mara (74MR)
Cruise identifier7/73
Cruise period1973-07-02 — 1973-07-27
StatusCompleted
Port of departureBuckie, United Kingdom
Port of returnBuckie, United Kingdom
PurposeTrials
Objectives1. To develop techniques for the direct observation of trawl gears by the diving team and to co-ordinate these with results obtained by instrumentation.
2. An instrumented assessment of "All metal" cambered boards, polyvalent boards, V-boards and flat boards on two types of ground.
3. Observation of board action (stability in operation and flexibility to ground conditions), turbulence behind the boards and the track and volume of the mud cloud created by different board forms.
4. Observation by divers of the effect of the rig variations on a trawl net pin-pointing the areas of stress.
5. Observation of fish behaviour in the area of the sweeps and spreading wires.
Chief scientistA Corrigall (Department of Agriculture and Fisheries for Scotland Aberdeen Marine Laboratory)
Cruise reportFRV Mara 7/73 cruise report mara7_73.pdf — access key 'C' (0.10 MB) 
Ocean/sea areas 
GeneralNorth Sea
Measurements 
Biology and fisheries 
Gear research
Geology and geophysics 
Bottom photographyDescription: 1500 feet of film and 600 still photographs shot underwater.