In the same year in which Khabarov explored the Amur (1648) the Cossack Dejnev, starting from the Kolyma, sailed round the north-eastern extremity of Asia through the strait which was rediscovered and described eighty years later by Bering (1728).
In the season of 1740 he continued his voyage to beyond the Kolyma, wintering at Nizhni Kolymsk.
Isai Ignatiev made a voyage eastward from the Kolyma river in 1646, and Simon Dezhnev in 1648 followed his route and prolonged it, rounding the East or Dezhnev Cape, and entering the strait.
Several attempts were also made to navigate the sea from the Lena to the Kolyma.
The bays of the Kolyma, the Chaun and Kolyuchin are of little importance.
The Cossack Simon Dezhneff is thought to have made a voyage, in the summer of 1648, from the river Kolyma, through Bering Strait (which was rediscovered by Vitus Bering in 1728) to Anadyr.
The New Siberia islands are occasionally visited by hunters, as is also the small group of the Bear Islands opposite the mouth of the Kolyma.