Weight is the most important factor for fuel economy in boats. Cruising boats usually have poor fuel economy, under 2 miles per gallon, hence they usually only report fuel usage in gallons per hour to hide the poor economy.  See BoatTest.com for various fuel economy figures.

Pontoon boats are very light catamarans for their size and capacity because they use the cylindrical shape for strength and rigidity, thereby minimizing the need for more weight and cost of aluminum. 25 ft, 25 in. diameter, pair of pontoons only weigh 500#. We weighed the completed boat as pictured on 8-10-15 and it was 3760# just as you see it including the 150 hp motor and full fuel tank, less the 1100# trailer. 

The front under deck is angled up over 6 inches to handle waves better than other pontoon boats. 6 inches makes a large difference since the underdeck is only about 14 in off the water to begin with -- giving a 40% increase in front underdeck clearance and wave catching ability. The pontoons become partial wave-piercing shapes like the America's cup boats have pioneered. This also gives room for an anchor locker in the front deck. No other pontoon boat we know of has this feature.

We have lifting strakes on the insides of the pontoons for more efficient planing and minimizing the rolling out in turns, as most catamarans and pontoons do. The strakes make it so the inside pontoon on a corner digs in a little while the outside pontoon rides up a bit on the lifting strakes.

The underside of the deck is entirely sheeted in aluminum so the water does not hit the cross members, causing drag. This completes the shape like a power catamaran, but with the reduced weight and cost of the aluminum pontoons.

Standing Headroom: Large main cabin with standing headroom of 6' on both sides. The pontoons are cut out so you step down into them, allowing 6 ft headroom under the low profile main cabin. This also gives and 'island berth' with access from each side so you don’t have to crawl over your partner getting in and out. Island berths are only found in much larger vessels.

Private Head: The head [bathroom] has solid walls and a door for privacy. Sized like the bathroom in a new Boeing 737 jet, it is 19-22 in. wide and 36 in. deep. Shown with optional larger 9 gal [std. 5 gal] Potti also with deck pump out. Deck pump out makes emptying easy and yet no pumps or plumbing to clog for low maintenance.

Safety: The front and rear of the pontoons have 4-6 separate air chambers to provide Positive Flotation to float the boat and its rated capacity of 12 persons. The outboard motor and outboard fuel tank prevent flammable and noxious fumes from coming into either cabin in the event of a fuel leak.

There are no through hulls and no bilge pumps [no Bilge!] for safety, simplicity, and low maintenance.