RRS Discovery D89
Cruise summary report
| Cruise Info. | |
| Ship name (ship code) | RRS Discovery (74E3) |
| Cruise identifier | D89 |
| Cruise period | 1977-11-23 — 1977-12-20 |
| Status | Completed |
| Port of departure | Barry, United Kingdom |
| Port of return | South Shields, United Kingdom |
| Purpose | Research |
| Objectives | 1. To recover and reset current meter moorings at nominal positions.
2. To set an additional current meter mooring at a site on the Azores-Biscay rise close to 41.5N 20W. 3. To test and incorporate in a current meter mooring a depth and tilt telemetering command pinger. 4. To carry out extensive wire tests of acoustic release and command equipment. 5. To deploy this acoustic equipment on a temporary mooring and to conduct acoustic ranging trials. 6. To test and use a free fall acoustic profiler in order to determine vertical profiles of current velocity. 7. To make tests of a sea surface, acoustically tracked float made from plastic components. 8. To deploy T-7 XBT probes at 40km intervals on all passage legs. |
| Chief scientist | W John Gould (Institute of Oceanographic Sciences Wormley Laboratory) |
| Cruise report |  (0.63 MB) |
| Ocean/sea areas | |
| General | North East Atlantic Ocean (limit 40W) |
| Track charts |  |
| Measurements | |
| Physical oceanography | |
| Surface measurements underway (T,S) | Quantity: track kilometres = 3704 Description: T only |
| Bathythermograph | Quantity: number of profiles = 100 |
| CTD stations | Quantity: number of stations = 3 |
| Current meters | Quantity: number of deployments = 4 Description: 270 days |
| Current profiler (eg ADCP) | Quantity: number of deployments = 10 |
| Currents measured from ship drift | Quantity: track kilometres = 3704 |
| Meteorology | |
| Routine standard measurements | |
| Geology and geophysics | |
| Multi-beam echosounding | Quantity: track kilometres = 3704 |
