In general, flat-bottomed rowing and sailing craft were the most widely used of the North American boat types. The flat-bottomed hull appeared in two basic forms: the scow, or punt, and the "flatiron," or sharp-bowed skiff. Most scows were box-shaped with raking or curved ends in profile; punts had their sides curved fore and aft in plan and usually had curved ends in profile. The rigs on scows varied with the size of the boat. A small scow might have a one-mast or two-mast spritsail rig, or might be gaff rigged; a large scow might be sloop rigged or schooner rigged. Flatiron skiffs were sharp-bowed, usually with square, raked transom stern, and their rigs varied according to their size and to suit the occupation in which they were employed. Many were sloop rigged with gaff mainsails; others were two-mast, two-sail boats, usually with leg-of-mutton sails, although occasionally some other kind of sail was used. If a skiff had a two-mast rig, it was commonly called a "sharpie"; a sloop-rigged skiff often was known as a "flattie." Both scows and flat-bottomed skiffs existed in Colonial times, and both probably originated in Europe. Their simple design permitted construction with relatively little waste of materials and labor. Owing to the extreme simplicity of the majority of scow types, it is usually impossible to determine whether scows used in different areas were directly related in design and construction. Occasionally, however, a definite relationship between scow types may be assumed because of certain marked similarities in fitting and construction details. The same occasion for doubt exists with regard to the relationships of sharp-bowed skiffs of different areas, with one exception--the large, flat-bottomed sailing skiff known as the "sharpie." The New Haven Sharpie The sharpie was so distinctive in form, proportion, and appearance that her movements from area to area can be traced with confidence. This boat type was particularly well suited to oyster fishing, and during the last four decades of the 19th century its use spread along the Atlantic coast of North America as new oyster fisheries and markets opened. The refinements that distinguished the sharpie from other flat-bottomed skiffs first appeared in some boats that were built at New Haven, Connecticut, in the late 1840's. These craft were built to be used in the then-important New Haven oyster fishery that was carried on, for the most part, by tonging in shallow water.