Cruise inventory

RRS Discovery D95

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS Discovery (74E3)
Cruise identifierD95
Cruise period1978-10-25 — 1978-11-17
Port of departureSouth Shields, United Kingdom
Port of returnRecife, Brazil
Objectives1. To collect tidal pressure records from a line of stations between West Africa and Northeast Brazil, to be supplemented by tide gauge records from coastal ports and islands of both continents. The records were required not only for tidal boundary conditions for the North Atlantic Ocean, but also to define low frequency pressure waves with possible coherence across the ocean, of interest to the international FGGE exercise. IOS had also sent D.L. Leighton to Ascension Island just before the cruise, to install a presure recorder at the jetty there.
2. To record surface and deep currents at the Equator at about 32.5W, for comparison with pressure gradients measured simultaneously, again of potential FGGE interest.
3. To take CTD and current profiles from surface to 500m at two equatorial cross-sections, 1N to 1S along the meridians 27.5W and 32.5W, for definition of the undercurrent structure, for FGGE. All records of wind and surface currents in the equatorial regions were similarly relevant.
4. To attempt recovery of a current meter mooring laid by Institut fur Meereskunde, Kiel in December 1977 at about 32N, 22W.
Chief scientistDavid E Cartwright (Institute of Oceanographic Sciences Bidston Laboratory)
ProjectFGGE (2 cruises)
Cruise reportRRS Discovery D95 cruise report d95and97.pdf — access key 'C' (0.83 MB) 
Ocean/sea areas 
GeneralNorth Atlantic Ocean
Track chartsRRS Discovery D95 cruise track — trk2204a.html
Physical oceanography 
Surface measurements underway (T,S)
CTD stationsQuantity: number of stations = 14
Subsurface temperature and salinity measurementsQuantity: 5
Description: T only
Current metersQuantity: 6
Description: 36 days
Current profiler (eg ADCP)Quantity: 14
Description: current shear profiles
Currents measured from ship drift
Sea level (inc. bot. press., inverted echosounder)Quantity: activity duration in days = 36
Routine standard measurements
Geology and geophysics 
Single-beam echosoundingQuantity: track kilometres = 926
Magnetic measurements
Moorings, landers, buoys 
Physical oceanography 
Current meters0° 19' 59" S  32° 28' 59" W — Deep current meter mooring.
Sea level (inc. bot. press., inverted echosounder)10° 5' 59" N  17° 13' 59" W — Tide gauge deployed.
Sea level (inc. bot. press., inverted echosounder)0° 55' 59" N  29° 16' 59" W — Tide gauge deployed.
Sea level (inc. bot. press., inverted echosounder)0° 57' 59" N  35° 33' 59" W — Tide gauge deployed.
Sea level (inc. bot. press., inverted echosounder)6° 3' 59" N  20° 57' 59" W — Tide gauge deployed.
Sea level (inc. bot. press., inverted echosounder)3° 7' 59" N  25° 3' 59" W — Tide gauge deployed.