Cruise inventory

RRS Discovery D75

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS Discovery (74E3)
Cruise identifierD75
Cruise period1975-10-22 — 1975-11-08
Port of departureBarry, United Kingdom
Port of returnSanta Cruz de Tenerife, Spain
ObjectivesThe principal objectives of the cruise were as follows:
1) To obtain a series of bottom sediment and pore water samples, using a new box corer and a new in-situ pore water sampler, from a variety of environments off the north west African margin
2) To obtain a series of large volume water samples, at all depths, for investigations of the organic and inorganic composition of suspended particles and for studies of the concentration patterns of selected dissolved trace metals
3) To obtain samples of the sea-surface organic films
4) To carry out an extensive benthic sampling programme, including near-bottom sampling using RMT equipment and a semi-balloon trawl.
Chief scientistStephen E Calvert (Institute of Oceanographic Sciences Wormley Laboratory)
ProjectGeochemical and biological sampling off North West Africa
Cruise reportRRS Discovery D75 cruise report d75.pdf — access key 'C' (5.68 MB) 
Ocean/sea areas 
GeneralNorth East Atlantic Ocean (limit 40W)
Track chartsRRS Discovery D75 cruise track — trk1485a.html
Physical oceanography 
Surface measurements underway (T,S)Quantity: track kilometres = 3241
Water bottle stationsQuantity: number of stations = 3
Chemical oceanography 
OxygenQuantity: 3
SilicateQuantity: 3
Trace elementsQuantity: 3
Biology and fisheries 
PhytoplanktonQuantity: 1
ZoobenthosQuantity: 3
BirdsDescription: Observations made throughout the cruise, with each observation lasting 10 minutes.
Routine standard measurements
Geology and geophysics 
Core - soft bottomQuantity: number of cores = 3
Description: chemical analysis of sediments
Multi-beam echosoundingQuantity: track kilometres = 3241
Magnetic measurementsQuantity: track kilometres = 1222.32