RRS Discovery D86
Cruise summary report
|Ship name (ship code)||RRS Discovery (74E3)|
|Cruise period||1977-09-07 — 1977-09-30|
|Port of departure||Southampton, United Kingdom|
|Port of return||Barry, United Kingdom|
|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)|
|Cruise report||(10.98 MB)|
|General||North East Atlantic Ocean (limit 40W)|
|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|
|Upper air observations||Quantity: number of observations = 30|
|Routine standard measurements||Description: logged continuously throughout cruise|