Yuri Fyodorovich Lisyansky was an explorer and officer in the Imperial Russian Navy. He served as a volunteer in the British Royal Navy and later headed the first Russian circumnavigation aboard the Neva. He was also among the early western explorers to visit Easter Island.

Nadezhda was a three-masted sloop, the ex-British merchantman and slave ship Leander, launched in 1799. A French privateer captured her in 1801, but she quickly came back into British hands. Private Russian parties purchased her in 1802 for the first Russian circumnavigation of the world (1803-1806), and renamed her. Although it is common to see references to the "frigate Nadezhda", she was a sloop, not a frigate, and she was never a warship. After her voyage of exploration she served as a merchant vessel for her owner, the Russian-American Company, and was lost in 1808.