Traditional pontoons have two tubes but newer designs have three and are called tritoons. Pontoon: Pontoon boats ride on (typically) aluminum tubes. At speed, they tend to pound when they encounter choppy water so they’re ideal for lakes of calm bays. They offer good volume below and significant deck space above. They’re quite buoyant and stable and they get on plane quickly. Tri-Hull or Tunnel Hull: Popular with fisherman as well as with sport boat enthusiasts, tri-hulls, also called cathedral hulls, have a combination M-shaped bottom. Fast, distance fishing boats like center consoles tend to have a V bottom so they can run fast on open water to get to the fishing grounds quickly. They take a bit more power to push up onto a plane, tend to roll or bank in sharp turns and due to the angle of the hull, have less interior volume for stowage or accommodations. V-Bottom: Deep V hulls cut through waves and ride smoothly in chop. Small aluminum or fiberglass bay and fishing boats often benefit from flat hulls, which have a shallow draft and provide a good amount of deck space both of which are ideal for fishing on calm bodies of water such as small lakes and ponds or slow rivers. They require only a small engine to get on plane but can ride rough and wet in chop or heavy weather. Planing hulls come in a variety of shapes, each of which has it benefits and disadvantages.įlat Bottom: Flat-bottomed boats are very stable and can carry a heavier load. They behave like displacement hulls at low speed but pop up onto a plane usually around 15-16 MPH depending on the design and load. Most powerboats and personal watercraft have planing hulls that ride on the water at higher speeds. At rest, round hulls tend to roll with the waves and swells. Displacement hulls are usually round on the bottom with ballast placed low in the center. They are slower moving but quite steady under way and are capable of carrying large loads with relatively small propulsion units. Large ships, some trawlers and traditional recreational sailboats have displacement hulls. Within each category, there are numerous configurations that further define the boat and its most popular uses. Displacement hulls ride through the water while planing hulls ride on top of it. Boats are built to do a variety of things and much of the differentiation lies in the shape of their hull.
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