RRS Discovery D141

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS Discovery (74E3)
Cruise identifierD141
Cruise period1983-10-26 — 1983-11-16
Port of departureSouth Shields, United Kingdom
Port of returnDakar, Senegal
Objectives1. To recover 3 ALS and 2 Moored Sources, part of the Sofar Float Programme, which were deployed from Discovery Cruise 138, June 1983.
2. To recover 7 Current Meter Moorings on the Madeira Rise, which were deployed from Discovery Cruise 139, July 1983.
3. To deploy, test and recover a new Digital OBS, for which it will be necessary to tow an air-gun for a short run of a few hours.
4. To deploy, test and recover PUPPI, a new instrument designed to log pore pressures in ocean sediments.
5. To deploy and test a dummy penetrometer with its telemetering transponder in the Great Meteor East area.
6. To listen to the Francis Beacon at 47N 11W on passage out, if timing convenient.
7. To check and work up scientific equipment modified on-board during 1983 refit.
Chief scientistBrian S McCartney (Institute of Oceanographic Sciences Wormley Laboratory)
Cruise reportRRS Discovery D141 cruise report d141.pdf (0.77 MB) 
Ocean/sea areas 
GeneralNorth West Atlantic Ocean (limit 40W)
SpecificGreat Meteor East/ Madeira Rise
Track chartsRRS Discovery D141 cruise track — trk2923.html
Physical oceanography 
Current metersQuantity: number of recoveries = 18
Description: No. of recovered;laid on Cr.139;100 days
Other physical oceanographic measurementsQuantity: number of stations = 2
Description: Autonomous listening station(moorings laid on Cr.138) acoustic stations
Routine standard measurements
Geology and geophysics 
In-situ seafloor measurement/samplingQuantity: number of deployments = 1
Description: pop-up pore pressure instrument
Multi-beam echosoundingQuantity: track kilometres = 3704
Other geological/geophysical measurementsQuantity: number of deployments = 2
Description: digital pop-up seismometers testing