Cruise inventory

RRS John Murray JM15/75

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS John Murray (74MJ)
Cruise identifierJM15/75
Cruise period1975-10-21 — 1975-11-04
StatusCompleted
Port of departureBarry, United Kingdom
Port of returnBarry, United Kingdom
PurposeResearch
Objectives1. To carry out studies of sandwaves and associated dune bed forms in the Skerries Bank area of Start Bay.
2. To carry out a detailed bathymetric survey of sandwaves in the South Sandette Bank area.
3. To carry out trials with the EG & G sonar in a vertical tow mode.
4. To carry out sonar surveys off Bournemouth and Totland Pier.
5. To continue operating trials with Rangemaster relative positioning system.
Chief scientistD Nicholas Langhorne (Institute of Oceanographic Sciences Taunton)
Cruise reportRRS John Murray JM15/75 cruise report john_murray15_75.pdf — access key 'C' (0.39 MB) 
Ocean/sea areas 
GeneralEnglish Channel
North Sea
Track chartsRRS John Murray JM15/75 cruise track — trk1618a.html RRS John Murray JM15/75 cruise track — trk1618b.html RRS John Murray JM15/75 cruise track — trk1618c.html
Measurements 
Physical oceanography 
Other physical oceanographic measurementsQuantity: number of profiles = 3
Description: sound velocity stations
Meteorology 
Other meteorological measurementsDescription: sea and swell
Geology and geophysics 
In-situ seafloor measurement/samplingQuantity: number of dives = 10
Description: sampling by divers
Multi-beam echosoundingQuantity: track kilometres = 93
Long/short range side scan sonarQuantity: number of hauls = 30