Cruise inventory

RRS Charles Darwin CD73

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS Charles Darwin (74AB)
Cruise identifierCD73
Cruise period1992-09-30 — 1992-10-26
StatusCompleted
Port of departureFunchal, Portugal
Port of returnPonta Delgada, Portugal
PurposeResearch
ObjectivesThis was the third of four scheduled mooring cruises planned for this experiment. The purpose of this cruise was to recover and redeploy five surface moorings deployed in February 1992 as part of the ONR funded ASTEX and Subduction experiments. In conjunction with the mooring work, a series of 59 CTD stations were made and water samples taken to be analysed for tritium levels, salinity and dissolved oxygen content. Hourly XBTs and meteorological observations were also made.
Chief scientistRichard P Trask (Woods Hole Oceanographic Institution Department of Physical Oceanography)
ProjectSubduction experiment
Coordinating bodyONR, USA
Cruise reportRRS Charles Darwin CD73 cruise report cd73_92.pdf — access key 'C' (0.81 MB) 
Ocean/sea areas 
GeneralNorth East Atlantic Ocean (limit 40W)
SpecificEastern north Atlantic
Track chartsRRS Charles Darwin CD73 cruise track — cd73_92trk.pdf (00 MB) 
Measurements 
Physical oceanography 
Surface measurements underway (T,S)Quantity: activity duration in days = 25
Description: 5m depth
BathythermographQuantity: number of profiles = 200
Description: hourly XBTs on transit between moorings, T-7 probes
Water bottle stationsQuantity: number of stations = 59
Description: Salinity only
CTD stationsQuantity: number of stations = 59
Description: NBIS CTD, typically to 500m, some to 1000m and 2000m
Current metersQuantity: number of stations = 5
Description: surface moorings recovered & redeployed
Chemical oceanography 
OxygenQuantity: number of stations = 59
OxygenQuantity: number of stations = 59
Description: NBIS CTD, typically to 500m, some to 1000m and 2000m
Trace elementsQuantity: number of stations = 59
Description: helium and tritium
Meteorology 
Routine standard measurementsQuantity: activity duration in days = 25
Description: hourly
Moorings, landers, buoys 
Physical oceanography 
Current meters33° 1' 59" N  21° 58' 59" W — NE, 8 months durn. redep 2 Oct 1992
Current meters18° 6' 0" N  33° 53' 59" W — SW, 8 months durn, redep 11 Oct 1992
Current meters32° 53' 59" N  33° 53' 59" W — NW, 8 months durn. redep 24 Oct 1993
Current meters25° 31' 59" N  28° 55' 59" W — C, 8 months durn. redep 15 Oct 1992
Current meters17° 58' 0" N  22° 3' 0" W — SE, 8 months durn. redep 7 Oct 1992