The nearly straight N coast between Piyangdo Myoji and Udo Sudo consist mostly of black lava rocks, piled up in heaps, and projecting rocky ledges. Cheju (Jeju), about midway along this coast, is the principal town on the island. To the E of Cheju the hills rise steeply inland and are broken by narrow valleys. Piyang Do (Biyang Do)(33°25'N., 126°15'E.) affords anchorage, in about 13 to 15m, sand, between the E side of the island of Piyangdo and Cheju Do. Anchorage may also be had SW of Piyangdo, in 13 to 31m, sand and shells. Local knowledge is necessary for both anchorages. Small local vessels can anchor either 0.3 mile S of Piyangdo, in 10 to 11m, sand, or in a bay on the SE side of the islan,d in depths of 2 to 3m; the latter is a good anchorage except in S winds. The bottom is rocky and uneven in the vicinity of these anchorages, and vessels may experience difficulty in weighing anchor. A light is exhibited on Piyangdo. A submarine pipeline has been laid SE from Piyangdo.

Location