Nearly seventy samples of the ocean bottom sediments have been collected over the continental shelf off Visakhapatnam on board INS JAMUNA. Grain size analysis has been carried out in the laboratory.

Statistical parameters such as the Standard deviation, skewness and kurtosis and the CM pattern have been studied in relation to the sorting and the zonal distribution of sediments in the area under study. The sediments beyond 30 fathom line consist of relict sands which indicate that the coast line in the past would have extended beyond the present 30 fathom line.