Cruise inventory

Sperus 7/77 Leg 8

Cruise summary report

Cruise Info. 
Ship name (ship code)Sperus (74TJ)
Cruise identifier7/77 Leg 8
Cruise period1977-07-16 — 1977-07-28
Port of departureLerwick, United Kingdom
Port of returnLerwick, United Kingdom
ObjectivesGeological and geophysical mapping of the UK Continental Shelf.

Calibration runs with the MX600 sonar carried out. Gravity, magnetic and pinger data was recorded. Problems occurred with the airgun, compressor and hydrophones. Sonar towed at a depth of 400m.
Chief scientistRobin A Floyd (Institute of Geological Sciences, Edinburgh)
Cruise reportSperus 7/77 Leg 8 cruise report sperus7_77.pdf — access key 'C' (18.20 MB) 
Ocean/sea areas 
GeneralNorth Sea
Track chartsSperus 7/77 Leg 8 cruise track — sperus7_77_geology.pdf (0.39 MB)  Sperus 7/77 Leg 8 cruise track — sperus7_77_lines1-10.pdf (0.21 MB)  Sperus 7/77 Leg 8 cruise track — sperus7_77_lines12-108.pdf (0.70 MB) 
Geology and geophysics 
Single-beam echosoundingDescription: regional geophysical survey
Long/short range side scan sonarDescription: calibration runs with MX600 sonar and tows at 400m
Single channel seismic reflectionDescription: pinger; regional geophysical survey
Multichannel seismic reflectionDescription: wide angle reflection.Format: seismic graphic recorder. Regional geophysical survey.
Gravity measurementsDescription: regional geophysical survey
Magnetic measurementsDescription: regional geophysical survey