Cruise inventory

Sperus 2/77 Leg 4

Cruise summary report

Cruise Info. 
Ship name (ship code)Sperus (74TJ)
Cruise identifier2/77 Leg 4
Cruise period1977-05-18 — 1977-05-31
Port of departureLeith, United Kingdom
Port of returnNewcastle, United Kingdom
ObjectivesGravity survey: Area A.

Gravimeter, magentometer, echo-sounder and pinger
6 days carryinng out a detailed gravity survey for a commercial company (reported separately).
S40 and S75 gravity meters.
Normal gravity programme for the rest of the leg.
Chief scientistAlan S Mould (Institute of Geological Sciences, Edinburgh)
Cruise reportSperus 2/77 Leg 4 cruise report sperus2_77.pdf — access key 'C' (14.75 MB) 
Ocean/sea areas 
GeneralNorth Sea
SpecificNorth Sea
Track chartsSperus 2/77 Leg 4 cruise track — sperus2_77_a.pdf (0.77 MB)  Sperus 2/77 Leg 4 cruise track — sperus2_77_all.pdf (0.53 MB) 
Geology and geophysics 
Single-beam echosounding
Seismic refraction
Gravity measurements
Magnetic measurements