Keelboat has two distinct meanings related to two different types of boats: one a riverine cargo-capable working boat, and the other a classification for small- to mid-sized recreational sailing yachts.
Historical keel-boats 
A Keel boat, Keelboat, or Keel-boat is a type of usually long narrow cigar-shaped riverboat, or unsheltered water barge which is sometimes also called a poleboat—that is built about a slight keel and is designed as a boat built for the navigation of rivers, shallow lakes, and sometimes canals that were commonly used in America including use in great numbers by settlers making their way west in the century-plus of wide-open western American frontiers. They were also used extensively for transporting cargo to market, and for exploration and trading expeditions, for watercraft transport was the most effective means to move bulk or weight before the advent of the modern post-world war II transportation networks.
Keelboats were similar to riverboats, but like other barges were unpowered and were typically controlled with oars or poles—usually the latter. Keelboats have been used for exploration, such as the Lewis and Clark Expedition, but were primarily used to transport cargo or settlers in the early 19th century. The process of moving a keelboat upriver was extremely difficult, though current dependent. Most of these keelboats were 50 to 80 feet (15 to 24 m) long and 15 feet (5 m) wide. They usually had a cabin in the middle, but were sometimes constructed with an open deck. Mike Fink is probably the most noted keelboater in history.
Historical account of two Keel Boats published in the original "Courier Journal" Of Lafayette, Indiana 1833
We stop the press to announce the arrival this morning of the steam-boat, REPUBLICAN, Toll, Master from the rapids of the Wabash. The Republican had in tow keel boats, “the Hoosier Lady” and “the Hoosier Boy,” bringing freight to Lafayette, Messrs Taylor & Harter, Taylor & Li??? J. McCormick, J. B. Semans and Hunter, and for Messrs, Ewing of the Bridge at Logansport. This is the first arrival at Lafayette this year. We understand the Republican is going to try and ascend the Wabash at Logansport. If she is successful she be the first one that ever has been, and with entitlement to the premium, which we learn is been offered by General Tipton and other enterprising and worthy citizens of that first arrival. The Wabash is in steam boating condition, and we may experience several arrivals, in a few days.
In Great Britain 
Modern keelboats 
A keelboat is technically any sailboat with a keel—as opposed to a centerboard or daggerboard. In New Zealand the term keeler is frequently used as a generic alternative - meaning any sailboat with a keel, regardless of size.
ISAF (International Sailing Federation) usage differentiates keelboats (including the 12-meter class) from generally larger yachts, despite overlap in the sizes of boats in the two classes. The Olympic Games uses keelboat to describe keeled boats with up to a three-man crew, as opposed to larger-crewed boats such as the 12-metre class.
In some countries yachts can also be differentiated from keelboats with the addition of a toilet or "head" as the term "keelboat" is in some places understood to mean a sailboat with a keel that is designed purely for recreational/racing purposes, while the term "yacht" describes a sailboat designed for overnight transport.
See also 
- "Keelboats". Retrieved 2009-07-02. Unknown parameter
- Official town website, history. "welcome to Brownsville". Retrieved 2009-07-02. "Brownsville situated, at the western most point of Fayette County, on the NationaL Road and overlooking the Monongahela River was the gateway to the west. Thomas Brown, realizing that pioneers would be drawn to the Brownsville area to get to the Ohio Valley and the state of Kentucky, purchased land in the 1700s and by mid-1700s a town was being mapped out. It was then, that the town of Brownsville (named for Thomas Brown and formerly known as Redstone Old Fort) became a "keel-boat" building center as well as other businesses for travelers. The businessmen from Brownsville supplied transportation and supplies to the traveling pioneers, and the town became very prosperous. The steamboat industry soon took over to facilitate traffic along the Monongahela River. The very first steamboat, the Enterprise, to travel to New Orleans and return by its own power was designed and built in the Brownsville boatyards and launched from the Brownsville Wharf in 1814."
- Classic Boat guide to X One Design Keelboat
- Solent XOD Forum on CrewInCowes.co.uk website
- The Keelboat Age on Western Waters, by Leland D. Baldwin, University of Pittsburgh Press, 1941. (provides the authority for the previous linked website)
- Steambots Times, Keelboats
|Wikimedia Commons has media related to: Keelboats|