There are daily ferry services between Port Blair and Hut Bay (Little Andaman), though the boat takes very long, about 10 hours. Some of the ferries leave early in the morning, at 6.30am-7am and reach Little Andaman the same day, and some leave around 8pm and reach the next morning. A tentative schedule is available here http://db.and.nic.in/integrated_appln/uploadfiles_dss/nicobarsch.php. For exact details, contact the Directorate of Shipping Service, Andaman and Nicobar Administration, Phoenix Bay Jetty, Port Blair (Tel: 03192-245555 / 230480). If you wish to go further on to Car Nicobar, there’s a ferry every Friday from Port Blair to Car Nicobar via Hut Bay. The return ferry starts from Car Nicobar on Saturday. Bad weather alerts and ferry cancellation news is published on The Daily Telegrams (http://db.and.nic.in/telegram/toppage.aspx).