British Geological Survey (BGS) Geophysical Survey 1979/14: Shetland (10/07/1979 to 14/08/1979)

Report: Armstrong, EJ. 1979. Cruise Report for Project 79/14, West Shetland and Project 79/15, Bosies Bank. (IGS Report No 101). Project 79/14 was designed to provide regional geophysical coverage of the Foula sheet, of the IGS 1:250000 map series, on a N-S, E-W grid of lines at approximately 15km by 9 km 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. The watergun provided superior records to those of the airgun giving resolution comparable to the sparker in fair weather, down to 800ms of sediments. Up to 400ms penetration was achieved by the sparker, while the boomer provided good resolution in the shallow section. In depths less than 300m the transit sonar was used.

报告：Armstrong, EJ. 1979. 西设得兰项目79/14及博西厄斯银行项目79/15巡航报告。（IGS报告编号101）。西设得兰项目79/14旨在为IGS 1:250000系列地图的福拉区域提供区域性的地球物理覆盖，以大约15公里×9公里的网格线进行南北、东西方向的布设。此外，还计划在奥克尼区域进行一系列重力测量，以完善该地区的重力覆盖。在利用Huntec深海拖曳旁声纳对FLAGS管道路线进行研究之后，对哈里布特银行区域的地形进行了区域地球物理线的测量。水枪提供的记录优于空气枪，其分辨率与晴天下的电火花相当，可达800毫秒的沉积物。电火花实现了高达400毫秒的穿透深度，而拖曳式旁声纳在浅水区提供了良好的分辨率。在深度小于300米时，使用了通过式声纳。