Grady White's World's largest dealer for 2012, 2013, 2014 & 2015 The only Authorized Grady White Boats Dealer for Cape Cod, Martha's Vineyard, Nantucket, South Eastern Massachusetts & Rhode Island. Authorized dealer for Yamaha outboards. We re a full service boat dealership with new and used boats. Yamaha Master technicians on staff. Mobile Service. Fiberglass and gelcoat repair and more!