RRS Discovery D3_2

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS Discovery (74E3)
Cruise identifierD3_2
Cruise period1964-03-07 — 1964-04-05
Port of departureAden, Yemen
Port of returnPort Louis, Mauritius
ObjectivesTo complete its part of the UK contribution to the International Indian Ocean Expedition, Discovery occupied 291 water sampling stations in the Indian Ocean in 154 days at sea.
Chief scientistJohn C Swallow (National Institute of Oceanography)
ProjectInternational Indian Ocean Expedition
Cruise reportRRS Discovery D3_2 cruise report d3.pdf (0.63 MB) 
Ocean/sea areas 
GeneralIndian Ocean
Gulf of Aden
Track chartsRRS Discovery D3_2 cruise track — d3track.pdf (0.68 MB) 
Physical oceanography 
Surface measurements underway (T,S)Quantity: number of stations = 3
Water bottle stationsQuantity: number of stations = 60
Description: 33 to the bottom
Subsurface temperature and salinity measurementsQuantity: number of stations = 3
Current metersQuantity: number of profiles = 80
Description: current-shear measurements
Neutrally buoyant floatsQuantity: number of deployments = 11
Description: 14 to 62 hours
Chemical oceanography 
OxygenQuantity: number of stations = 3
PhosphateQuantity: number of stations = 3
NitrateQuantity: number of stations = 3
SilicateQuantity: number of stations = 3
Biology and fisheries 
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: number of profiles = 22
Description: chlorophyll
ZooplanktonQuantity: number of samples = 6
Description: depth samples for bacteriological analysis
ZooplanktonQuantity: number of hauls = 24
Description: vertical plankton and fine mesh net hauls
NeustonQuantity: number of hauls = 38
Description: 15-minute tow with Neuston net
Pelagic fishQuantity: number of hauls = 11
Description: Indian Ocean standard net hauls
Pelagic fishQuantity: number of hauls = 7
Description: Isaac-Kidd trawls