RRS Discovery D66
Cruise summary report
| Cruise Info. | |
| Ship name (ship code) | RRS Discovery (74E3) |
| Cruise identifier | D66 |
| Cruise period | 1974-08-31 — 1974-09-29 |
| Status | Completed |
| Port of departure | Dakar, Senegal |
| Port of return | Barry, United Kingdom |
| Purpose | Research |
| Objectives | The main objectives for GATE (the GARP* Atlantic Tropical Experiment) were summarised in GATE Report No.3 as follows:
1) To provide a means of estimating the effects of smaller tropical weather systems on the large synoptic-scale circulations. 2) To facilitate the development of numerical modelling and predicting methods |
| Chief scientist | Robert I Tait (University of Liverpool Department of Oceanography) |
| Project | GATE PHASE III C-SCALE EXPERIMENT |
| Cruise report |  (10.75 MB) |
| Ocean/sea areas | |
| General | North Atlantic Ocean |
| Track charts |  |
| Measurements | |
| Physical oceanography | |
| Surface measurements underway (T,S) | Quantity: track kilometres = 4074 |
| Bathythermograph | Quantity: number of profiles = 2 |
| CTD stations | |
| Subsurface temperature and salinity measurements | Quantity: track kilometres = 1667 Description: batfish |
| Current meters | Quantity: 3 Description: 18 days E1-mooring:08-40.8N;22-58.2W(19d.),E3-mooring:08-41.92N;23-10.03W(25d.)& E1-spar:08-40.8N;22-58.2W(9d.) |
| Currents measured from ship drift | Quantity: activity duration in days = 15 |
| Neutrally buoyant floats | |
| Instrumented wave measurements | Quantity: 38 Description: SBWR records |
| Other physical oceanographic measurements | Quantity: 32 Description: protas(free fall shear probe) |
| Biology and fisheries | |
| Zooplankton | Quantity: number of hauls = 7 Description: survey 7 hauls between 300/600 m.long-term study of meso-pelagic fauna |
| Nekton | Quantity: number of hauls = 7 Description: Made between 300/600 m. long-term study of meso-pelagic fauna |
| Meteorology | |
| Incident radiation | Description: cont.logging solarimeter |
| Routine standard measurements | Description: 6 hrly. |
| Other meteorological measurements | Description: all-sky photographs and photographic balloon tracking |
| Other meteorological measurements | Quantity: 2 Description: met.packages on 2 anchored buoys air sea interface studies |
| Other meteorological measurements | Description: 2 min.values of dry and wet bulb temp.,hull temp.,wind and atm.pressure |
| Geology and geophysics | |
| Multi-beam echosounding | Quantity: track kilometres = 3704 |
