33.5-foot catamaran, whose captain lives aboard full-time, ferries passengers through Miami- or Florida Keys-area waters on 3-hour jaunts

Naturalists educate amid views of Golden Gate Bridge, Angel Island, seals & waterfowl & private charter enables floating merrymaking

Sea-Doos that seat three & boats that seat up to 14 traverse crystalline waters of Lake Coeur d'Alene with views of wildlife & mountains

A 21-foot, 250-horsepower Regal 2100 LSR boat ferries passengers along Des Plaines River & nearby waterways

Groups cruise through Charleston Harbor for up to two hours on 24-foot Scout Bay Boats manned by licensed captains

USCG-licensed captain pilots 56-foot boat as trained naturalist informs passengers about orca whales and local wildlife such as bald eagles

Private cruise for six aboard a 37-foot yacht travels Chicago River while a docent recounts the city's rich architectural history.

50-minute tour on speedboat accommodates up to 108 & includes info on Tide Point, USS Torsk & Canton while journeying to Key Bridge & back

Groups explore Harborage Marina in well-equipped private boats outfitted for sporting & leisure with GPS, efficient engines & bait wells

Boston's skyline backdrops 90-minute self-piloted voyages across Boston harbor that pass famous vessels & Charleston Navy Yard