Cruise inventory

RRS John Murray JM18/75 (B/12/75)

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS John Murray (74MJ)
Cruise identifierJM18/75 (B/12/75)
Cruise period1975-12-09 — 1975-12-18
StatusCompleted
Port of departureBarry, United Kingdom
Port of returnBarry, United Kingdom
PurposeResearch
ObjectivesBristol Channel survey with additional stations off the North Cornish coast.
Chief scientistAlan W Morris (Institute of Marine Environmental Research, Plymouth)
Ocean/sea areas 
GeneralIrish Sea and St. George's Channel
Bristol Channel
Track chartsRRS John Murray JM18/75 (B/12/75) cruise track — trk1543a.html RRS John Murray JM18/75 (B/12/75) cruise track — trk1543b.html RRS John Murray JM18/75 (B/12/75) cruise track — trk1543c.html
Measurements 
Physical oceanography 
Surface measurements underway (T,S)Quantity: track kilometres = 1131.572
Water bottle stationsQuantity: number of profiles = 76
Description: Surface plus 2 bottom water samples
Transparency (eg transmissometer)Quantity: track kilometres = 1131.572
Current metersQuantity: number of deployments = 2
Description: 50 hours
Chemical oceanography 
PhosphateQuantity: track kilometres = 1131.572
NitrateQuantity: track kilometres = 1131.572
SilicateQuantity: track kilometres = 1131.572
Contamination 
Trace metalsQuantity: number of profiles = 60
Data held at BODC 
Discrete samples 
400  General station with STD/bottles/additional instrumentsDissolved organic carbon concentration in the water column
Salinity of the water column
Horizontal velocity of the water column (currents)
Concentration of suspended particulate material in the water column
Temperature of the water column