an inlet off the western shore of Petr Velikii Bay of the Sea of Japan and off the coast of Primor’e Krai, RSFSR. Pos’et Bay is about 50 km long and 17–25 m deep. It is divided by the Crabbe Peninsula into the inlets of Reid Pallady on the west and Kitovyi Bay on the northeast. Tides are irregular and semidiurnal, with a maximum rise of less than 0.5 m. The bay freezes in winter. The settlement of Pos’et is located on Pos’et Bay.
Neolithic remains dating from the late third to early second millennia B.C. have been found along the bay in Zarech’e, Khansi, and Pos’et. Finds have included polished arrowheads, as well as knives, end scrapers, adzes, and arrowheads made of flinty slate by pressure flaking. The flat-bottomed pottery is decorated with toothlike and comblike impressions. The finds indicate links with the Neolithic culture of Hwanghae-pukto Province in the People’s Democratic Republic of Korea. The population engaged in hunting, fishing, and gathering. Pos’et Bay is named in honor of the Russian Admiral K. N. Pos’et.