During the Northeast Monsoon, small vessels can obtain anchorage about 0.6 mile SSW of Wu Jiao, in a depth of 9m, but there is usually a heavy ground swell. The currents in the anchorage set NE at a rate of 1 knot on the flood and SE at a rate of 1.5 knots on the ebb. Hudong Jiao (Hutung Chiao) (22°48'N., 115°57'E.) is situated about 8 miles E of Jaizi Jiao; on it there is a fort and a prominent dome shaped building resembling a beehive. A rock, peculiar in shape when seen from the E, lies close off a small islet 1 mile SE of Hudong Jiao. Heiyan Jiao (Black Rock Point) (22°47'N., 115°54'E.), which is distinguished by a conspicuous mound 32m high close NW of it, lies about 3 miles W of Hudong Jiao. The coast between Heiyan Jiao and Tianwei Jiao (Tien wei Chiao) (22°45'N., 115°49'E.), about 5 miles WSW, is a sandy plain. Jieshi Wan (Chieh shih Wan) (22°46'N., 115°40'E.) is a bay of quite regular dimensions, whose flat sandy shore is densely populated and whose approaches in moderate weather are crowded with fishing craft. Tianwei Jiao, the E entrance point, is the S extremity of a promontory which, rising to a sharp, conspicuous summit about 1 mile NW, is reported radar conspicuous at about 15 miles. It is marked by a light.

Location