There are two types of ferry services from Port Blair to Havelock, government
operated and private ferries. Government ferries cannot be booked online and
have to be booked physically from ticket counters. The best way is to ask your
hotel to get it done from your. Being locals, they can easily get the tickets
done. Private ferries can be booked online. There are many private ferry
service providers like Makruzz, Green Ocean, Coastal Cruise, etc.