"My customer has made offers on 15 different boats over the last two years," says Roy Sea, a seasoned yacht broker with Ocean Alexander. "I've been selling boats to his family for 25 years and this is the next generation. I sold his sister a boat a couple of months ago and I sold his father eight or nine boats, it was one of my first sales." Sea's story about his related clients is not exactly commonplace, but it should come as no surprise-after all, yachting is a family affair. Just ask Roy's brother, Walter, a yacht broker in the Ft. Lauderdale office of Camper & Nicholsons International.