Cruise inventory

RRS Discovery D1

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS Discovery (74E3)
Cruise identifierD1
Cruise period1963-06-01 — 1963-08-20
StatusCompleted
Port of departurePlymouth, United Kingdom
Port of returnAden, Yemen
PurposeResearch
ObjectivesThe first cruise of the RRS Discovery in the Indian Ocean was planned to survey the region off the South Arabian Coast. During the period of the south-west monsoon, active upwelling occurs along this coast and the intention of the survey was initially to delimit the area of upwelling and then to investigate its mechanisms and the ensuing cycle of chemical and biological events. It was hoped in the course of this work to collect as much information as possible which might be of use in the future to the development of any fisheries in this region.
Chief scientistRonald I Currie (National Institute of Oceanography)
ProjectInternational Indian Ocean Expedition
Cruise reportRRS Discovery D1 cruise report d1.pdf — access key 'C' (12.78 MB) 
Ocean/sea areas 
GeneralRed Sea
Arabian Sea
SpecificIndian Ocean; Red Sea, Arabian Sea,
Track chartsRRS Discovery D1 cruise track — d1track.pdf (00 MB) 
Measurements 
Physical oceanography 
Surface measurements underway (T,S)Description: Recordings throughout the cruise.
Bathythermograph
Subsurface temperature and salinity measurementsDescription: Recordings throughout the cruise.
Instrumented wave measurementsDescription: wave recordings taken daily.
Chemical oceanography 
OxygenDescription: Routine analysis made for dissolved oxygen, inorganic phosphate, nitrate and silicate.
NitrateDescription: Routine analysis made for dissolved oxygen, inorganic phosphate, nitrate and silicate.
SilicateDescription: Routine analysis made for dissolved oxygen, inorganic phosphate, nitrate and silicate.
Contamination 
Trace metalsDescription: Selected stations.
Biology and fisheries 
PhytoplanktonDescription: Fine-mesh nets and water bottle stations used to sample phytoplankton.
ZooplanktonDescription: 70cm vertical net hauls.
NeustonQuantity: number of hauls = 113
Description: fifteen minute routine hauls.
PhytobenthosDescription: Benthos sampling to estimate the ratio of macrobenthos to meiobenthos.
ZoobenthosDescription: Benthos sampling to estimate the ratio of macrobenthos to meiobenthos.
BirdsQuantity: number of observations = 140
Description: to determine both the qualitative and quantitative distribution of birds in the area of investigation.
Acoustic reflection on marine organisms.
Meteorology 
Incident radiationDescription: continuous recording.