Cruise inventory

Sperus 14/79 Leg 2

Cruise summary report

Cruise Info. 
Ship name (ship code)Sperus (74TJ)
Cruise identifier14/79 Leg 2
Cruise period1979-07-23 — 1979-08-06
Port of departureLerwick, United Kingdom
Port of returnLerwick, United Kingdom

Project 14/79 was designed to provide regional geophysical coverage of the Foula, of the IGS 1:250,000 map series, on a N-S, E-W grid of lines at approximately 15km and 9km spacing. A number of gravity lines were also to be run over the Orkney sheet to complete gravity coverage in that area. In addition, some regional geophysical lines were to be surveyed on the Halibut Bank sheet after a study of the FLAGS pipeline route with the Huntec deep tow boomer.

S40 and S75 gravity meters run on all lines
Barringer magnetometer
All lines run with sparker and deep tow boomer systems.
Depths <300m the transit sonar was used.
Chief scientistA Dobinson (Institute of Geological Sciences, Edinburgh)
Cruise reportSperus 14/79 Leg 2 cruise report sperus14and15_79.pdf — access key 'C' (9.09 MB) 
Ocean/sea areas 
GeneralNorth Sea
SpecificNorth Sea
Track chartsSperus 14/79 Leg 2 cruise track — trk2338.html
Geology and geophysics 
Single-beam echosoundingQuantity: number of surveys = 23
Long/short range side scan sonarQuantity: number of surveys = 18
Seismic refractionQuantity: number of surveys = 21
Description: sparker, pinger
Seismic refractionQuantity: number of surveys = 14
Description: boomer
Seismic refractionQuantity: number of surveys = 8
Description: airgun
Gravity measurementsQuantity: number of surveys = 23
Magnetic measurementsQuantity: number of surveys = 23