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根据灯塔总局批准的一项合同的规定,埃沙姆斯有限公司正在进行一项围绕不列颠岛屿的沿岸导航系统的研究工作。 研究的目的,是为了确定在合理布局和费用方面如何能最充分地利用现有的导航设备。正在进行试验灯塔和雾信号的确定射程和水平。评价各种导航设备的有效性、费用和受益的标准。这项研究也包括确定围绕不列颠岛屿距岸3～50海里间的海上交通量。
Under a contract approved by Lighthouse General Administration, Ehsames Limited is conducting a study on coastal navigation systems on the British Isles. The purpose of the study was to determine how best to utilize existing navigation equipment in terms of reasonable layout and cost. Ongoing tests to determine lighthouse and fog signal range and level. Evaluate the effectiveness, cost and benefits of various navigation devices. The study also included maritime traffic between 3 and 50 nautical miles off the coast of the British Isles.