How were the northwestern shores of North America discovered?

In July 1741, two Russian ships left the harbor of the port of Petropavlovsk under the command of Vitus Bering and Alexei Ilyich Chirikov (1703-1748). They headed towards the northwestern shores of North America. During the expedition, Russian sailors discovered the Aleutian and Commander Islands, as well as the northwestern parts of America. In Alaska, on the way back, V. Bering’s ship fell into a storm and was thrown to an unknown island. The sailors were forced to winter. Many of them, including Admiral Bering, died. The survivors built a small ship and reached Kamchatka. This expedition lasted almost ten years and went down in history as the Great Northern Expedition.