RRS Discovery D42
Cruise summary report
| Cruise Info. | |
| Ship name (ship code) | RRS Discovery (74E3) |
| Cruise identifier | D42 |
| Cruise period | 1971-09-21 — 1971-09-30 |
| Status | Completed |
| Port of departure | Stornoway, United Kingdom |
| Port of return | Barry, United Kingdom |
| Purpose | Research |
| Objectives | To see whether commercial pelagic fish could be detected at long ranges by the NIO lang range side-scan sonar, GLORIA; and if so, to use this ability to examine shoal distribution and movement in a limited area as a function of time. A purse-seine vessel, the 'LUNAR BOW', was under contract to identify the targets located by GLORIA by ringing and catching them. The area selected was an autumn inshore herring fishery in the Sea of the Hebrides, where the bathymetry was suitable for the experiment. |
| Chief scientist | J Stuart M Rusby (National Institute of Oceanography) |
| Cruise report |  (0.23 MB) |
| Ocean/sea areas | |
| General | Irish Sea and St. George's Channel North East Atlantic Ocean (limit 40W) |
| Track charts | (0.02 MB) |
| Measurements | |
| Physical oceanography | |
| Other physical oceanographic measurements | Quantity: number of profiles = 2 Description: sound velocity stations |
| Other physical oceanographic measurements | Quantity: 2 |
| Biology and fisheries | |
| Zooplankton | Quantity: 2 |
| Pelagic fish | Quantity: number of hauls = 2 |
| Meteorology | |
| Occasional standard measurements | |
| Other meteorological measurements | Description: air sea interface studies |
| Geology and geophysics | |
| Multi-beam echosounding | Quantity: track kilometres = 555 |
| Long/short range side scan sonar | Quantity: track kilometres = 927 |
