Planned maintenance — 18th January 2018 12:00 to 22nd January 2018 09:00 [more]

Cruise inventory

RRS John Murray JM4/67

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS John Murray (74MJ)
Cruise identifierJM4/67
Cruise period1967-07-24 — 1967-08-23
ObjectivesSeismic reflection profiling.
Traverse made from Pembrokeshire across the shelf to south-west Ireland.
Seismic refraction lines fired using sono-buoys.
Gravimeter survey.
Attempt to operate a proton magnetometer.
Chief scientistDerek J Blundell (University of Birmingham Department of Geology)
Cruise reportRRS John Murray JM4/67 cruise report john_murray4_67.pdf — access key 'C' (1.14 MB) 
Ocean/sea areas 
GeneralIrish Sea and St. George's Channel
SpecificNymphe Bank and St George's Channel
Biology and fisheries 
Gear researchDescription: sea-bed proton magnetometer trials
Geology and geophysics 
Single channel seismic reflectionQuantity: number of surveys = 2
Description: sparker seismic reflection profiler
Seismic refractionDescription: lines fired using sonobuoys, reversed lines
Gravity measurementsDescription: Askania ship-borne gravimeter