Yachts big and small (but mostly big) inhabit Fort Lauderdale's 300 miles of navigatable waterways, thus the city's moniker "Venice of America."  More than 42,000 boats call Fort Lauderdale home, most of them docked in one of 100 marinas and boatyards.   Naturally, the areas is a major manufacturing and maintenance center for yachts.   The boating industry is responsible for more than 109,000 jobs in the area.