Use echo sounder frequently when passing shallow water.
通过浅水域时，要常用回声仪测深。
A device used underwater to produce pulses of sound, as for an echo sounder.
特殊设计的专用降噪消声装置的采用，极大的抑制了机械噪声。
Inspection installation and water tightness transducer of echo sounder on berth.
测深仪换能器船台安装和水密性检查。
The echo sounder is now gradually out of use in navigation, because it has many errors.
回声测深仪在导航仪器中的地位在下降，其原因是它存在着较多的误差。
In bathymetric survey, the record seabed image is distorted due to the angular beam width of an echo sounder.
在海洋测深过程中，回声测深仪波束角效应使记录的测深图像失真。
When passing One Fathom Bank, check the depth and variable sand waves below the sea level all the time by echo sounder.
通过一托浅滩时，要一直测深校时水深及海面下多变的沙纹。
Multi-Beam Echo Sounder is an absolutely necessary seafloor mapping device with high accuracy and high efficient at 21st century. It is much fitted to sweep mapping for wide area.
多波束测深仪是高精度、高效率的地形测绘设备，适合大面积的扫海测量作业，是21世纪水下地形测量必不可少的测绘仪器。
Echo Sounder is a kind of acoustic measuring depth equipment, which can measure depth with the time between transmitted wave and echo on condition in which the speed of ultrasonic is fixed.
回声测深仪是用来测量水深的一种声学测量设备，其以水中超声波的传播速度为确定条件，利用发射波与反射回波时间差来测量水深。
The Parktronic system operates on the echo-sounder principle.
驻车定位系统根据回波发声器原理工作。
The record seabed image distorted due to the angular beam-width of echo-sounder in bathymetric, especially for gibbous terrain.
在海洋测深中，由于回声测深仪波束角效应的影响，对凸形海底的测量会带来较大的失真。
The record seabed image distorted due to the angular beam-width of echo-sounder in bathymetric, especially for gibbous terrain.
在海洋测深中，由于回声测深仪波束角效应的影响，对凸形海底的测量会带来较大的失真。
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