RRS John Murray JM5/81

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS John Murray (74MJ)
Cruise identifierJM5/81
Cruise period1981-05-01 — 1981-05-23
Port of departureBarry, United Kingdom
Port of returnImmingham, United Kingdom
Objectives1) An investigation of the slope on the mean sea level surface between Leith and Immingham. Current meters and off-shore pressure gauges were deployed in conjunction with a network of coastal sea level gauges

2) A study of the tidal energy budget in a shallow coastal region

3) Measurements of currents around a sandbank to test theories of spring-neap changes in the mean currents
Chief scientistDavid T Pugh (Institute of Oceanographic Sciences Bidston Laboratory)
Cruise reportRRS John Murray JM5/81 cruise report john_murray5and7_81.pdf (1.22 MB) 
Ocean/sea areas 
GeneralNorth Sea
Irish Sea and St. George's Channel
Track chartsRRS John Murray JM5/81 cruise track — trk2724a.html RRS John Murray JM5/81 cruise track — trk2724b.html
Physical oceanography 
Surface measurements underway (T,S)Quantity: track kilometres = 4600
CTD stationsQuantity: number of stations = 116
Current metersQuantity: number of stations = 15
Description: 24 c.m.;23 days
Sea level (inc. bot. press., inverted echosounder)Quantity: activity duration in days = 23