The sailing charter industry is one of the main businesses on the island and the BVI's diverse fleet is based on Tortola from where infinite sailing destinations can be reached. The reliable trade winds, beautiful, clear waters, and the fact that islands are close enough together to navigate to by eye alone, make the British Virgin Islands one of the best sailing destinations in the world. The islands are not just the haunt of experienced sailors; they attract many first-timers and families keen to experience the sailing lifestyle. Despite its many famous shipwrecks (great spots to seek out for diving and snorkeling excursions from your boat) these waters are generally very safe. Charter boat companies cater for all needs, from bareboat charters to day sails; snorkeling, diving and fishing trips, and crewed charters. Much of the British Virgin Islands is a national park so you can't just drop anchor wherever you please - many of the bays are protected areas - but there are numerous mooring buoys to make use of. Many people like to hire yachts for days or even weeks and this is probably the best way to explore the BVIs; it is certainly the most authentic, particularly if you are visiting places like Norman Island, which was the inspiration for Robert Louis Stevenson's Treasure Island.