Cruise inventory

FRV Mara 13A/80

Cruise summary report

Cruise Info. 
Ship name (ship code)FRV Mara (74MR)
Cruise identifier13A/80
Cruise period1980-11-04 — 1980-11-07
StatusCompleted
Port of departureBuckie, United Kingdom
Port of returnBuckie, United Kingdom
PurposeResearch
ObjectivesBiology. Roscop/Track Chart not required

1) To investigate the structure of fish schools and to assess the effects of changes in these structures on acoustic abundance estimation techniques
2) Underwater TV, still camera, stereo camera, and a small echo-sounder transducer were used
3) Underwater light measurements were made routinely during the cruise using one of the laboratory's standard photomultiplyer systems

An overnight stay was made in Invergordon
Chief scientistPeter A M Stewart (Department of Agriculture and Fisheries for Scotland Aberdeen Marine Laboratory)
Cruise reportFRV Mara 13A/80 cruise report mara13_80.pdf — access key 'C' (0.11 MB) 
Ocean/sea areas 
GeneralNorth Sea
SpecificMoray Firth, Inverness Firth
Measurements 
Physical oceanography 
Optics (eg underwater light levels)Description: Underwater light measurements made routinely during the cruise using one of the laboratory's standard photomultiplier systems.
Biology and fisheries 
Acoustic reflection on marine organisms.Description: Echo-sounder observations to investigate the structure of fish schools.