FRV Mara 13A/80
Cruise summary report
| Cruise Info. | |
| Ship name (ship code) | FRV Mara (74MR) |
| Cruise identifier | 13A/80 |
| Cruise period | 1980-11-04 — 1980-11-07 |
| Status | Completed |
| Port of departure | Buckie, United Kingdom |
| Port of return | Buckie, United Kingdom |
| Purpose | Research |
| Objectives | Biology. 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 scientist | Peter A M Stewart (Department of Agriculture and Fisheries for Scotland Aberdeen Marine Laboratory) |
| Cruise report |  (0.11 MB) |
| Ocean/sea areas | |
| General | North Sea |
| Specific | Moray 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. |
