Zenit

Soviet-Ukrainian kerolox medium-lift orbital rocket

A powerful Ukrainian-built rocket that became the foundation of Sea Launch — a floating platform on the Pacific equator that sold commercial GEO slots in the 2000s. The 2014 annexation of Crimea severed Russian access to Ukrainian hardware; Sea Launch's last launch was in 2014 and Zenit's last flight of any kind was in December 2017.