Cruise inventory

FRV Explorer 4A/68

Cruise summary report

Cruise Info. 
Ship name (ship code)FRV Explorer (74EX)
Cruise identifier4A/68
Cruise period1968-05-12 — 1968-05-20
StatusCompleted
Port of departureStornoway, United Kingdom
Port of returnStornoway, United Kingdom
PurposeResearch
Objectives''Explorer'' sailed from Aberdeen on the 10/05/1968 and arrived in Stornoway on the 11/05/1968 to land an engineer who had been carrying out tests on the log.

1) Hydrographic and Plankton sampling
2) Trawling survey
3) Intensive hydrobiological survey of a small area on the eastern edge of Rockall Bank

The Technicon Anaylser was run continuously throughout the cruise to provide surface silicate data. Phytoplankton sedimentation samples were collect for Dr Gillbricht, Kiel, for comparison with chlorophyll data and with carbon-14 estimates of production
Chief scientistJohn H Steele (Department of Agriculture and Fisheries for Scotland Aberdeen Marine Laboratory)
Cruise reportFRV Explorer 4A/68 cruise report explorer4_68.pdf — access key 'C' (0.20 MB) 
Ocean/sea areas 
GeneralNorth Atlantic Ocean
SpecificRockall, Butt of Lewis,
Measurements 
Physical oceanography 
Surface measurements underway (T,S)Description: T only
BathythermographQuantity: number of profiles = 46
Description: mechanical
Water bottle stationsQuantity: number of stations = 27
Description: 39 T surface
Chemical oceanography 
PhosphateQuantity: 15
Description: Technicon Anaylser was run continuously throughout the cruise to provide surface data
NitrateQuantity: 15
Description: Technicon Anaylser was run continuously throughout the cruise to provide surface data
Biology and fisheries 
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: 17
Description: The Turner fluorometer was run continuously for chlorophyll.
PhytoplanktonQuantity: 46
Description: In virto sampling carried out for calibration purposes
Pelagic fishQuantity: number of hauls = 19
Description: Depths ranging from 74-240 fathoms. Blue whiting was the priniciple species caught. Silver smelts, A.silus, A. sphyraena, rabbit fish, dogfish, and Sebastes were also caught