Sailing Andaman and Nicobar islands
Andaman and Nicobar islands are still a hidden gem of Andaman see, not much visited by tourists, making them still unspoilt.
The most essential things you can take are:
The closest destination to Andaman and Nicobar archipelago is Phuket island, Thailand. You can try to charter your yacht here.
The best period for sailing to Andaman and Nicobar islands is from May to October. You not only have to obtain Indian visa but also a special permission to entry island. Remeber some islands are closed for tourist just not to disturb native nations of islands (it mostly concern North Sentinel island).
Visiting Phuket, small relax
Crusing towards Nicobar archipelago
Great Nicobar Biosphere Reserve, Little Nicobar island
Crusing towards Perka island
Perka sightseeing and relax
Cruising towards Havelock island and Andaman archipelago
Relax and sightseeing of Port Blair, visiting local beaches
Relax on Radhangar beach
Cruising towards Phuket
Final day in Phuket
You can stock up in Port Blair, eventually in Phuket. Remeber to clean fruits and drink botteled water only. To avoid diarrhea buy food in supermarkets.
see: Andaman and Nicobar
Sunbathing, sightseeing, discovering local culture
The only one biggest danger are saltwater crcodiles.
Althougth Andaman and Nicobar are quite popular tourist attraction it's not so liberal as Goa or Kerala beaches. The best clothes for women are tank tops and shorts for the beach and summer trousers/long skirt, tank top and summer shirt for sightseeing.