Cruise inventory

RRS Shackleton S3/80 Leg 2

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS Shackleton (74SF)
Cruise identifierS3/80 Leg 2
Cruise period1980-05-07 — 1980-05-20
Port of departureHull, United Kingdom
Port of returnGreat Yarmouth, United Kingdom
ObjectivesThe area surveyed forms the northern half of the Spurn and Indefatigable sheets whch encompass the East Midlands Shelf in the west and passes eastwards across the Sole Pit inversion zone into the Anglo-Dutch basin.

Completed 1779km of regional survey comprising lines 9-32 inclusive using equipment developed in Leg 1. Early poor weather resulted in moderate quality seismic data. Thereafter, the weather and data quality were good. Humtec boomer records were of poor quality. Further tests were carried out on the UDI side scan sonar system. Not possible to tow the Humtex boomer and side scan sonar together without danger of entanglement. Experimentation with simultaneous display of air gun and sparker was successful. Good navigational accuracy. Gravity results were good.
Chief scientistMichael C Tully (Institute of Geological Sciences, Edinburgh)
Coordinating bodyNERC
Cruise reportRRS Shackleton S3/80 Leg 2 cruise report shackleton3_80leg1.pdf — access key 'C' (0.70 MB) 
Ocean/sea areas 
GeneralNorth Sea
Track chartsRRS Shackleton S3/80 Leg 2 cruise track — trk2470.html
Geology and geophysics 
Long/short range side scan sonarQuantity: track kilometres = 1779
Description: geophysical survey
Seismic refractionQuantity: track kilometres = 1779
Description: geophysical survey
Gravity measurementsQuantity: track kilometres = 1779
Description: geophysical survey