Cruise inventory

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
StatusCompleted
Port of departureBarry, United Kingdom
Port of returnImmingham, United Kingdom
PurposeResearch
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 — access key 'C' (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
Measurements 
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