A boat is a watercraft of a large range of types and sizes, but generally smaller than a ship, which is distinguished by its larger size, shape, cargo or passenger capacity, or its ability to carry boats.

Small boats are typically found on inland waterways such as rivers and lakes, or in protected coastal areas. However, some boats, such as the whaleboat, were intended for use in an offshore environment. In modern naval terms, a boat is a vessel small enough to be carried aboard a ship.[1]


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Boats vary in proportion and construction methods with their intended purpose, available materials, or local traditions. Canoes have been used since prehistoric times and remain in use throughout the world for transportation, fishing, and sport. Fishing boats vary widely in style partly to match local conditions. Pleasure craft used in recreational boating include ski boats, pontoon boats, and sailboats. House boats may be used for vacationing or long-term residence. Lighters are used to move cargo to and from large ships unable to get close to shore. Lifeboats have rescue and safety functions.

A number of large vessels are usually referred to as boats. Submarines are a prime example.[11] Other types of large vessels which are traditionally called boats include Great Lakes freighters, riverboats, and ferryboats.[12] Though large enough to carry their own boats and heavy cargoes, these vessels are designed for operation on inland or protected coastal waters.

The hull is the main, and in some cases only, structural component of a boat. It provides both capacity and buoyancy. The keel is a boat's "backbone", a lengthwise structural member to which the perpendicular frames are fixed. On some boats a deck covers the hull, in part or whole. While a ship often has several decks, a boat is unlikely to have more than one. Above the deck are often lifelines connected to stanchions, bulwarks perhaps topped by gunnels, or some combination of the two. A cabin may protrude above the deck forward, aft, along the centerline, or covering much of the length of the boat. Vertical structures dividing the internal spaces are known as bulkheads.

Until the mid-19th century most boats were made of natural materials, primarily wood, although bark and animal skins were also used. Early boats include the birch bark canoe, the animal hide-covered kayak[13] and coracle and the dugout canoe made from a single log.

By the mid-19th century, some boats had been built with iron or steel frames but still planked in wood. In 1855 ferro-cement boat construction was patented by the French, who coined the name "ferciment". This is a system by which a steel or iron wire framework is built in the shape of a boat's hull and covered over with cement. Reinforced with bulkheads and other internal structure it is strong but heavy, easily repaired, and, if sealed properly, will not leak or corrode.[14][15]

As the forests of Britain and Europe continued to be over-harvested to supply the keels of larger wooden boats, and the Bessemer process (patented in 1855) cheapened the cost of steel, steel ships and boats began to be more common. By the 1930s boats built entirely of steel from frames to plating were seen replacing wooden boats in many industrial uses and fishing fleets. Private recreational boats of steel remain uncommon. In 1895 WH Mullins produced steel boats of galvanized iron and by 1930 became the world's largest producer of pleasure boats.

Mullins also offered boats in aluminum from 1895 through 1899 and once again in the 1920s,[16] but it was not until the mid-20th century that aluminium gained widespread popularity. Though much more expensive than steel, aluminum alloys exist that do not corrode in salt water, allowing a similar load carrying capacity to steel at much less weight.

Around the mid-1960s, boats made of fiberglass (aka "glassfibre") became popular, especially for recreational boats. Fiberglass is also known as "GRP" (glass-reinforced plastic) in the UK, and "FRP" (for fiber-reinforced plastic) in the US. Fiberglass boats are strong, and do not rust, corrode, or rot. Instead, they are susceptible to structural degradation from sunlight and extremes in temperature over their lifespan. Fiberglass structures can be made stiffer with sandwich panels, where the fiberglass encloses a lightweight core such as balsa[17] or foam.

A boat displaces its weight in water, regardless whether it is made of wood, steel, fiberglass, or even concrete. If weight is added to the boat, the volume of the hull drawn below the waterline will increase to keep the balance above and below the surface equal. Boats have a natural or designed level of buoyancy. Exceeding it will cause the boat first to ride lower in the water, second to take on water more readily than when properly loaded, and ultimately, if overloaded by any combination of structure, cargo, and water, sink.

Since 1998 all new leisure boats and barges built in Europe between 2.5m and 24m must comply with the EU's Recreational Craft Directive (RCD). The Directive establishes four categories that permit the allowable wind and wave conditions for vessels in each class:[18]

Europe is the main producer of recreational boats (the second production in the world is located in Poland). European brands are known all over the world - in fact, these are the brands that created RCD and set the standard for shipyards around the world.[19]

If you are simply transiting through the park, a boat permit is not necessary. Boat permits are required for all recreational vessels including kayaks and dinghies, vessels operating under a Commercial Use Authorization and commercial fishing vessels.

Bringing your own boat to Dry Tortugas National Park will provide you with the most opportunities to explore this remarkable national treasure. Situated approximately 70 miles west of Key West, Florida, with no food, water, or fuel available in the park, proper planning is a must.


Learn about boating, mooring buoys, anchoring/docking, and more by visiting our Boating page.

Be it a speed- or sailboat, a jet-ski or fishing rig, we're here to help you protect one of your biggest and most prized investments. Learn more about the boat and watercraft coverages we offer below, then contact a local independent agent to discuss the right coverage for you.


Boat and personal watercraft insurance offers protection from theft, damage, and liability in case of an accident or injury experienced while using your boat. It can also protect you against damage or injury caused by another boater who may be uninsured or underinsured.

Though boat insurance is optional in many states, if you get a loan to pay for your boat, your lender will most likely require you to have boat coverage. Talk to your local independent agent to learn more.

Most likely, no. The homeowners policy provides liability coverage for low-horsepower outboard-motor-powered boats. If you have a jet drive, inboard outdrive, or stern drive boat, you would receive no coverage from the homeowners policy.

Your homeowners policy also does not offer coverage for pollution liability, wreckage removal, damage to your boat, towing, emergency assistance, and many of the other great coverages a Safeco watercraft policy provides. Talk with your local independent agent to make sure you understand your risks.

In the United States, more than 40 states have educational requirements for operating a boat or PWC on state waters. In Canada, all provinces have educational requirements for operating pleasure craft.

In the United States, more than 40 states have boater education requirements that must be successfully completed before you can legally operate your recreational vessel on state waters. Only an approved boater safety course will fulfill your state's boater education requirements. In Canada, all residents are required to successfully complete an approved boater safety course prior to operating a boat or personal watercraft on Canadian waterways.

Law enforcement officers and boating safety agencies enforce boater safety course requirements to make sure that every boater's experience on the water is both safe and enjoyable. Successfully completing an approved boater safety course keeps you compliant with the boating laws in your state or province.

Boating safety is a concern for everyone on the water. Even if you're not required to pass a boater safety course in your state or province, boater safety is everyone's responsibility. Boaters can keep themselves and their passengers safe by learning about responsible boat operation, etiquette, and the rules of the waterways. An educated boater is a safer boater.

Boat Ed is the only boater safety course provider that develops online courses, eBooks, and print materials on behalf of government boating safety agencies in North America. Boat Ed also develops educational materials for the U.S. Coast Guard Auxiliary.

Lake Superior is notorious for its cold temperatures, rough seas, fog, and sudden squalls. Boaters should be alert to changing conditions and should consult current marine forecasts before leaving on a trip. Marine weather forecasts are broadcast on marine channel 7, 162.525 MHz. 


Typical summer conditions feature high temperatures in the mid-70s Fahrenheit, lows in the mid-50s, winds of 5-20 knots, and waves of 1 to 4 feet. Summer thunderstorms are a frequent occurrence, and winds of 30 to 40 knots with 6 to 12 foot seas are possible. Average water temperatures in May and June may only be in the 40s. Even in late summer surface temperatures barely exceed 60 Fahrenheit, except in shallow, protected bays. Stay up to date on the current conditions throughout the park. 


Interested in taking a water taxi, sailboat, or motorized boat tour to the islands? Check out the commercial services page for a list of authorized water taxis and boat tours to take you to and around the islands.

Docks provide visitors with access to many of the islands. Space is reserved at some docks for NPS vessels and excursion boats. Remaining space is available to the public on a first come, first served basis. Please allow as much space as possible for other boats to dock. Mediterranean (bow or stern to the dock) and side to side mooring of vessels may not be allowed at park docks (check posted regulations). Boats may not be left unattended for more than 24 hours at public docks. Overnight docking fees within the park do apply. 


For the safety of visitors using the docks, the use of portable stoves or grills is not allowed on docks or on vessels tied to a dock (outside of galley areas). Bears may be attracted to grills at any location. Do not leave grills and food unattended. Swimming within 100 feet of public docks is not permitted. Visitors are asked to refrain from bathing with soap directly in the lake. Please observe quiet hours between 10 pm and 6 am (throughout the park). Be sure to check posted regulations upon arrival at any dock.


Rough weather may force boaters to extend their stay in the islands. Provisions are not available for sale in the park. Plan to bring extra food, water, and supplies in case you get weathered in. 2351a5e196

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