You should be able to board around 11am. Check in with customer service at 10am. If you don't have a phone that works in the BVI get one of the free ones from the electronic rental shop so customer service can call when the boat is ready. Walk the dock and look for the welcome sign with your name on it. When it goes up you can board. Plan your provisions for 11am. Once you board and have your gear stowed start pestering customer service for your checkout,