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| NATIONAL INSTITUTE OF OCEAN TECHNOLOGY CAMPUS AT PALLIKARNAI, CHENNAI. |
| SURVEY VESSEL |
| OVERVIEW OF A TYPICAL HYDROGRAPHIC SURVEY. MULTIBEAM, SIDE SCAN, SUB-BOTTOM, MAGNETIC & SIESMIC INSTRUMENTS ARE DEPLOYED TOGETHER |
| SATTELITES IN LOWER ORBIT AT 22,000KM HIGHT ARE TRANSMITTING GPS SIGNALS USED FOR POSITION CALCULATION OF VESSELS |