Hi Shafiq, I have listed out the option of going to Andaman by ship. There are three or four sailings every month from Kolkata and Chennai to Port Blair and vice-versa. There is one sailing for Visakhapatnam in a month. The voyage takes about 3-4 days (50-60 hours ideally) and the ship normally berths at Port Blair for about two to four days. You can also see below best options to stay in Andaman. Please click on the links to see information, location and booking details.