Cruise inventory

FRV Explorer 3A/69

Cruise summary report

Cruise Info. 
Ship name (ship code)FRV Explorer (74EX)
Cruise identifier3A/69
Cruise period1969-06-07 — 1969-06-16
Port of departureAberdeen, United Kingdom
Port of returnLerwick, United Kingdom
ObjectivesHydrographic survey in a region north-east of Shetland, at 62 minutes North 2 degrees East at the edge of the Northern Shelf boardering the Norwegian Deeps, and 60 degrees 56 minutes and 40 minutes West off Muckle Flugga that commenced on the 08/06/1969. Additional hydrographic stations were worked near the drogues to supplement earlier observations of the area.

Preliminary trials were made of an automated chemical analysis system incorporating channel switching and automatic calibration. A full set of samples was taken with the Modified Plankton Indicator for the SMBA Laboratory Edinburgh. The echo sounder was in continuous operation and fully annotated.
Chief scientistRobert Johnston (Department of Agriculture and Fisheries for Scotland Aberdeen Marine Laboratory), Roger S Bailey (Department of Agriculture and Fisheries for Scotland Aberdeen Marine Laboratory)
Cruise reportFRV Explorer 3A/69 cruise report explorer3_69.pdf — access key 'C' (0.22 MB) 
Ocean/sea areas 
GeneralNorth Atlantic Ocean
Physical oceanography 
Surface measurements underway (T,S)Description: T only
Water bottle stationsQuantity: number of stations = 37
Description: also 33 T surface
CTD stationsQuantity: number of stations = 5
Surface drifters/drifting buoysQuantity: 16
Description: parachute drogues released at 6 positions, each drogue being tracked for at least 13 hours/curr.cross
Chemical oceanography 
OxygenQuantity: 6
PhosphateQuantity: 6
NitrateQuantity: 6
SilicateQuantity: 6
Biology and fisheries 
Phytoplankton pigs (eg chlorophyll, fluorescence)Description: chlorophyll
PhytoplanktonQuantity: 22
Routine standard measurements