Cruise inventory

Sperus 04/78

Cruise summary report

Cruise Info. 
Ship name (ship code)Sperus (74TJ)
Cruise identifier04/78
Cruise period1978-05-24 — 1978-07-13
StatusCompleted
Port of departurePlymouth, United Kingdom
Port of returnPlymouth, United Kingdom
PurposeResearch
ObjectivesThe four legs comprising this project were designed to extend the regional survey of the SW Approaches to the south and west of the Scilly Isles out of the Continental Shelf edge. The survey was to be carried out using shallow seismic, gravity and magnetic techniques on a skewed 7km by 12.5km grid. However, due to lack of time this programme was slightly modified.
Chief scientistA Dobinson (Institute of Geological Sciences, Edinburgh), Alan S Mould (Institute of Geological Sciences, Edinburgh), Robin A Floyd (Institute of Geological Sciences, Edinburgh)
Cruise reportSperus 04/78 cruise report sperus4_78.pdf — access key 'C' (10.58 MB) 
Ocean/sea areas 
GeneralCeltic Sea
Track chartsSperus 04/78 cruise track — trk2121.html Sperus 04/78 cruise track — trk2121a.html
Measurements 
Geology and geophysics 
Single-beam echosoundingQuantity: track kilometres = 6432
Long/short range side scan sonarQuantity: number of hauls = 72
Description: format 0 is seismic analogue paper record
Single channel seismic reflectionQuantity: track kilometres = 3350.268
Description: pinger measurements.Format 0 is seismic analogue paper record
Single channel seismic reflectionQuantity: track kilometres = 5969
Multichannel seismic reflectionQuantity: track kilometres = 35.188
Description: wide angle reflection
Gravity measurementsQuantity: track kilometres = 6402.364
Magnetic measurementsQuantity: track kilometres = 5593.04