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VIKAS TIWARI
Registered04-Jan-12
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9 years ago
Comment at What are the differences between raster and vector charts ?
raster chart is the photo copy of the paper chart,vector chart is electronic form of chart ...

9 years 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 ...

9 years 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 ...