The Maryland School uses Island Packets out of Red Hook and offer courses throughout the winter in the VI - previously they kept an IP Celestial here in the winter and taught courses for offshore passages on the South and Northbound deliveries.
http://www.mdschool.com/Caribbean.htmI have found their instructors to be excellent.
If they haven't already researched the charter captain dream ---Your friends should realize they will need USCG Captains Licenses to operate with paying passengers aboard - a minimum of 360 days underway at sea on a USCG Sea Service document and quite a few other certifications, STCW, CPR etc. - things that are well beyond the scope of the Sailing Schools.
