A kayak has a waterline length that is significantly shorter than the overall length of the boat. A waterline is the actual length of the kayak that sits in the water. According to REI, "the length of a boat's waterline is the most important" feature to look for. Long kayaks are defined as greater than 13 feet in length. They are used on lakes, bays, slow-moving rivers and the ocean. When looking for a long kayak, consider the overall length as well as the waterline length to get the most from your boat.
Benefits
Long kayaks are more efficient in the water per paddle stroke. They typically hold more gear than their smaller counterparts, so they can be used for day or even overnight trips. The narrower they are, the faster they can travel. They track better in the water and maintain a straight path far more easily.
Types
Longer kayaks fall into three basic categories. Recreational kayaks are usually beginner kayaks. They range in length from 9 to 16 feet, so look for one greater than 13 feet. They are wider with increased stability for first-time users and are solid choices for day trips. Touring kayaks are long narrow kayaks ranging from 12 to 16 feet. They are typically fast and efficient and are used on lakes, slow rivers and the ocean. They often have rudders, which are paddles that aid in turning the boat. They have less initial stability, but they are made to withstand rough waters and have enhanced secondary stability. Racing kayaks can be as long as 20 feet and as narrow as 18 inches. They are usually made of lightweight material.
Construction
According to Nimbus Kayaks, "Most ocean touring kayaks have waterline lengths between 12 and 18 feet. The most practical waterline length for touring kayaks is between 15 and 16 feet." The beam of the kayak is essentially the kayak's width. The rocker is the curvature of the hull. An increase in the rocker increases the ability to turn a kayak. Volume is also an important factor in construction of a kayak. Total volume refers to gear-storage room. This is essential if you are taking the kayak on overnight trips. The actual composition of the boat is also a factor. Kayaks are made from polyethylene, polyvinyl chloride, thermoformed ABS, and various fiberglass and synthetic blends. Composite boats are usually more expensive but are the lightest in weight.
Pricing
Long kayak prices vary according to accessories on the boat, its length and the type of construction, but they are typically more expensive than shorter kayaks. Composite boats are more expensive than simple polyethylene boats. Outfitter stores offer boats for potential buyers to demo. Testing out the kayaks helps determine which one you personally prefer. The demo boats are also often sold at discounted prices.
Considerations
Longer kayaks are often harder to turn than a 10-foot kayak. They often weigh more due to the increased size of the hull, or body of the kayak. Hull shape is an important factor if you are buying a longer kayak for increased speed in water. Rounded hulls have greater speed than V-shaped or flat-bottom hulls. Also, consider what you will be using the kayak for. River kayaking is easier in a shorter kayak, due to the increased ability to control the kayak in rough waters and the need to roll the kayak when necessary. Ocean water requires a slightly wider boat for stability. Be sure your kayak meets your particular needs.
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