Echo Sounding in Fishery Research
Echo Sounding in Fishery Research
复制标题
渔业研究中的回声探测
作者：
Oscar Sund
在去年2月离开卑尔根之前，用于罗弗敦地区（约翰港）年度海洋调查的船只安装了一个休斯回声测深装置（磁致伸缩系统，频率每秒16000次）。这台机器沿着海岸一路顺利地工作着，除了发现了许多有趣的地方之外，还发现了许多迄今为止没有料想到的特征；其中，深峡湾的粘土地板厚度总是在10米左右，而且通常非常平坦。
THE vessel used for the annual oceanographical investigations in the Lofoten area (the Johan Hjort) had a Hughes echo sounding gear (magnetostriction system, frequency 16,000 cycles per second) installed before leaving Bergen last February. The gear worked smoothly all along the coast and besides furnishing a great number of interesting sections, revealed many features hitherto unsuspected; among others, that the clay flooring of deep fjords is invariably about 10 m. thick and generally very flat.