TRADITIONAL anglers opt for the chair. A fighting chair and bucket harness allow an angler to bring the strength of his or her entire body into the battle. A chair also helps the mate direct the fight, since he can swivel the chair to whichever direction is appropriate at the moment. And don't overlook the stowage advantages of a chair. You can keep at least four rods close at hand, and many captains add a line or two to the spread by running them directly from the chair. On the downside, a chair eats up cockpit space, costs thousands of dollars, and requires a backing plate, which-since it's usually laminated to the deck-is prepositioned and pretapped at the factory, so you can't choose your own optimal spot.