The Asiatic umiaks may be classed into two types, the Koryak type of Eastern Siberia and the Chukchi model of the Siberian side of Bering Strait. The Koryak umiaks illustrated by Jochelson show a highly developed boat, rather lightly framed compared to boats on the American side. In profile the bow has a long raking curve and the stern much less; as a result the bottom is rather short compared to the length over the gunwales. Viewed in plan, the gunwales are rounded in at bow and stern to form almost a semicircle. At the bow the gunwales are bent around a horizontal headboard tenoned over the stem head but at the stern there is no headboard. The sheer is moderate and very graceful. The flare of the sides is great and there appears to be a little ~V~ in the bottom transversely. There is also a slight fore-and-aft rocker in the bottom. The construction is similar to that of the Alaskan umiaks except that the Koryak umiaks have double-chine stringers and also a double riser, or longitudinal stringer, halfway up the sides. The riser is not backed with a continuous stringer, as is the chine; instead three short rods are lashed inside the side frame members. The side stringers do not reach bow and stern. The four thwarts are located well aft, and between the first and second thwarts is a larger space than between the others, for cargo. The boats are rowed, two oarsmen to a thwart. The cover was formerly walrus hides split and scraped thin but more recently the skin of the bearded seal has come into use. A rectangular sail of deer skin is sometimes lashed to a yard and set on a tripod mast about amidships. Two legs of the mast are secured to the gunwale on one side, the remaining leg is lashed to the opposite gunwale. Judging by the drawing made by Jochelson[3] this umiak is perhaps the most graceful of all those known today. [3] Reproduced in JAMES HORNELL, _Water Transport_ (Cambridge: University Press, 1946), p. 160. [Illustration: Figure 166 UMIAK COVERED WITH SPLIT WALRUS HIDE, Cape Prince of Wales, Alaska. The framework can be seen through the translucent hide cover. (_Photo by Henry B. Collins._)]