【摘 要】
：
在海中,电波不能通。很早即用“声”来测定海底情况。从船上发出声信号,通过到达海底返回来的时间,来测量深度。然而海底并非平坦,比陆地起伏更大。用“点”和“线”来测深,
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在海中,电波不能通。很早即用“声”来测定海底情况。从船上发出声信号,通过到达海底返回来的时间,来测量深度。然而海底并非平坦,比陆地起伏更大。用“点”和“线”来测深,无法探明地形.因此须用“多狭幅波束(mulfi·narrow beam)”声波,从面上来测量方可。这种新装置,除日本“拓洋号”外,海洋科学技术中心作业实验船“海洋号”也有装备。发出12千赫声波信号,将海底分割成16个,进行测深。对1万米级水深,可一次测出8公里宽的海底情
In the sea, the radio can not pass. Very early to use “sound” to determine the situation on the sea floor. Send an acoustic signal from the ship and measure the depth by the time it reaches the seabed. However, the seabed is not flat and larger than the land. Using “point” and “line” for sounding, terrain can not be ascertained, so “mulfi · narrow beam” sound waves must be used to measure from the surface. This new device, in addition to Japan’s “Ocean Extension”, Ocean Science and Technology Center operating experimental vessel “Ocean” is also equipped. Sending a 12 kHz acoustic signal, dividing the seabed into 16, for sounding. For a depth of 10,000 meters, a submarine love situation can be measured at a distance of 8 kilometers
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