, Kaigani Strait, and Tlevak Strait.
NOAA Office of Coast Survey 1993 chart detail. Dall Island was first called "Quadra," after
Juan Francisco de la Bodega y Quadra, until 1879, when it was renamed in honor of naturalist
William H. Dall. The island was also considered part of
Prince of Wales Island as recently as 1903.
Cape Muzon, the southernmost point of the island, is the western terminus, known as Point A, of the
A–B Line, which marks the marine boundary between the state of Alaska and the Canadian province of
British Columbia, per the position of the Canadian government on the decision of the arbitration tribunal under the
Alaska Boundary Treaty of 1903. The
United States Coast and Geodetic Survey charts produced in 1884 and 1894–95 laid the boundary line with Canada from Cape Muzon through Dixon Entrance and
Portland Canal. and designated Point A as one endpoint of the A–B Line. outlined in 1903 for the resolved boundary. Furthermore, Canada regards the A–B line as defining Canada's internal waters within the Dixon Entrance. On the other hand, the U.S. considers the A–B line as having been described to allocate sovereignty over the land masses within the Dixon Entrance, with Canada's land to the south of the line. In contrast, it considers the waters subject to international marine law. ==Logging==