RRS Discovery D86
Cruise summary report
| Cruise Info. | |
| Ship name (ship code) | RRS Discovery (74E3) |
| Cruise identifier | D86 |
| Cruise period | 1977-09-07 — 1977-09-30 |
| Status | Completed |
| Port of departure | Southampton, United Kingdom |
| Port of return | Barry, United Kingdom |
| Purpose | Research |
| Objectives | The main items in the scientific programme were:
1) Setting and recovering four surface moorings carrying meteorological recorders and shallow thermistor chains. 2) Occupying a pattern of CTD stations, in the form of widely spaced small (15km) triangles, each triangle being occupied twice in a 12.5 hour period. 3) Acoustic tracking of near-surface floats, including depth telemetering floats. 4) Tests of a new batfish and using it for mapping near-surface water structure. 5) Trials of an electromagnetic shear probe. 6) Radiosonde tracking, including use of W-3 LO-CATE equipment. 7) Trials of pitch-roll buoy. 8) Intercomparison of electromagnetic and rotor-vane vector averaging current meters. 9) Recovering six current meter moorings and a tide gauge, set by 'Challenger' in July. 10) Surface T and S observations, and bathymetry, on passage when in deep water. |
| Chief scientist | John C Swallow (Institute of Oceanographic Sciences Wormley Laboratory) |
| Project | JASIN 1977 |
| Cruise report |  (10.98 MB) |
| Ocean/sea areas | |
| General | North East Atlantic Ocean (limit 40W) |
| Track charts |  |
| Measurements | |
| Physical oceanography | |
| Surface measurements underway (T,S) | Description: recorded throughout cruise |
| CTD stations | Quantity: number of stations = 44 |
| Subsurface temperature and salinity measurements | Description: batfish profiling,mostly 15-90m,126 hrs.of steaming |
| Current meters | Quantity: number of deployments = 10 Description: 45 days |
| Neutrally buoyant floats | Quantity: number of deployments = 3 Description: 6 floats were also tracked at surface |
| Sea level (inc. bot. press., inverted echosounder) | Quantity: activity months = 3 |
| Meteorology | |
| Upper air observations | Quantity: number of observations = 30 |
| Routine standard measurements | Description: logged continuously throughout cruise |
