1 decades ago Comment at What is phasing and ranging wrt echo sounder PHASING:phasing is a method in echo sounder to determine the depth of water where the speed of stylus changed but scale is constant ...
1 decades ago Comment at Working principle of the dgps it has a fix position and it compared with 3 satellite position and compare with own position and diffrence will be find out,and transtmit the difference in all vessels are uhf range
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