More than 60 years after Sir William “Bill” Hamilton’s jetboats clawed their way up the Colorado River, the company that built them faces a new challenge: scaling to meet rising dema ...

Jet boats were once mostly hairpin-­happy thrill rides, with the reflexes of a slot-car. Today, they’ve matured into hot-selling family models, viable alternatives to craft propelled by propellers.

Research indicates that boats exclusively used in salt water, which are not maintained and cleansed with fresh water, may depreciate more rapidly. This could influence the book value 10% to 15%. Take ...