Which were accomplishments of russian explorers vitus bering and alexei chirikov?

With his knowledge in navigation cartography, Vitus Jonassen Bering achieved some important goals in those fields, such as:

In Alexei Ilich Chirikov case, being the second in command in Bering’s first and second expeditions.  Some of his accomplishments were:

They established fur trading posts in the Pacific Northwest.

They discovered and explored the Bering Strait and Bering Sea.

They discovered and claimed Alaska for the Russian Empire.

Explanation:

the effect of the ming leaders banning ships with more than two masts was that there was no further construction of ships masts, because there was a surplus. ming emperors disallowed foreign exploration

d) the constitution rights of native americans and their right to self-government on reservations