FRV Mara 13C/80
Cruise summary report
| Cruise Info. | |
| Ship name (ship code) | FRV Mara (74MR) |
| Cruise identifier | 13C/80 |
| Cruise period | 1980-11-17 — 1980-11-20 |
| Status | Completed |
| Port of departure | Buckie, United Kingdom |
| Port of return | Buckie, United Kingdom |
| Purpose | Research |
| Objectives | 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 Equipment was unloaded on the 21/11/1980 |
| 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, off Nairn |
| 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. |
