Position fixing requirements for oceanography and marine surveys in India

H.N. Siddiquie


Oceanographic studies and marine surveys require position fixing of varying accuracy for different tasks. The considerable expenditure involved in ship time and data collection demand a greater accuracy in position fixing. Therefore, an analysis of some of the basic requirements of position fixing vis-a-vis its cost and the cost of data collected is often necessary. The present offshore activities in the country indicate that accurate position fixing will initially be required largely in the line of sight and coastal zone (the continental shelf). Similarly very accurate position fixing is needed in areas where exploration and exploitation of oil are in progress. Precise position fixing is an essential prerequisite even in the line of sight zone for the exploration and exploitation of heavy mineral placers, marine pollution studies and harbour development. In the remote zone and deep sea position fixing at present is required only for regional reconnaissance programmes, but consideration should be given for development of integrated position fixing systems for exploration and exploitation of deep sea manganese nodules


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