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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 |