Island chain In the Aleutian Islands between the Islands of Four Mountains to the E and the Rat Islands, to the W and extending from Amukta Pass W about 310 mi to Amchitka Pass; they include Seguam, Amlia, Atka, Great Sitkin, Little Tanaga, Umak, Igitkin, Chugul, Tagalak, Kagalaska, Adak, Kanaga, Tanaga, Gareloi, Amatignak, Ulak, Unalga, Kavalga, Ogliuga and other smaller islands.
First explored by Russians Andreian Tolstyk, Peter Vasiutkin, and Maxim Lazaref in 1761. The merchant Tolstyk owned the expedition vessel Andreian and Natalia, named after himself and his wife.
Aankuuga, Aanudaax, Agamaxchizalix, Azamis Cove, Cabin Cove, Chalux, Chisak Bay, Crater Cove, Haanugix, Hanimisax, Hanisxa, Hiixsax, Iiqiisix, Laska Cove, Liisis Tatuu, Lower Arm, Naagix Adimtusix, Nahmagix, Piper Cove, Qagaagix Chalux, Qigaagix Adimtusix, Qigaangax, Quail Bay, Round Cove, Saamlus, Sand Bay, Scripps Bay, Sitkin Sound, Tagugilgim-qakuudguu, Tana Bight, Ugiilagaadax, Ulgusix, Umak Bight, Upper Arm Cabin Cove, Uuhmugzux, Yoke Bay,
Aalux, Agony Point, Black Point, Cape Akuyan, Cape Azamis, Cape Chakik, Cape Chisak, Cape Kiugilak, Cape Lises, Cape Ruin, Cape Umak, Cemetery Point, Elbow Point, Galas Point, Kaga Point, Knaxchiing, Kyugaadax, Narrows Point, Oglala Point, Passage Point, Qatxayas Yaaga, Ragged Point, Rip Point, Sharp Cape, Sulphur Point, Tana Point, Tanagam Amaga, Zaliva Point,
Amgasis, Asuksak Island, Atangax, Aziak Island, Box Island, Chaika Rock, Chisak Island, Great Sitkin Island, Kagalaska Island, Kanu Island, Little Tanaga Island, Rip Rock, Silak Island, Tagadak Island, Tanaklak Island, Tanax Angunax, Umak Island,