The Andamans are a very relaxed place so the rules are simple as well. Act with respect and decorum, dress appropriately (especially away from the beach), and as anywhere, always ask permission before taking photographs of the local population. A beach destination does not mean that the locals are used to seeing women in revealing
A beach destination does not mean that the locals are used to seeing women in revealing swimwear. Please be sensitive to the traditions of the locals and cover up when in areas where locals are present like jetty areas and village markets.
Having said that, we would like to stress that the Andamans is a remote place and although the people are casual, one should not expect the kind of comfort or the level of service that is expected of a hotel/resort in mainland India.