On Monday, the Russian Federal Space Agency (Roscosmos) announced plans to move survival training for all Soyuz passengers to a Russian naval base in Sevastopol, Crimea. That strategic move could put the US and other nations in a diplomatic bind as American, European, and Japanese astronauts-in-training would need to travel there without Ukrainian-issued visas.

If the foreign crew refuses to travel to Crimea without the proper papers, and in so doing refuses to recognize Russia’s claim to legitimacy of rule in the conflict-ridden peninsula, the astronauts will fail their training and be disqualified from their trip to the International Space Station (ISS), which is due for a routine crew replacement.

As NBC News notes, the Sevastopol base was commonly used a decade ago for Russian splashdown survival training, when the country’s space program was headed by the Russian Air Force. "But as space budgets dwindled,” NBC says, "that training was transferred to a small lake near Moscow that was deemed adequate for the basics.” Today, the space program is managed by Roscosmos and the budget is even tighter, so money issues are likely not responsible for the move back to Crimea.

In a press release announcing the move, Yuri Lonchakov, Head of the Cosmonauts' Training Center, said that Roscosmos was also planning on holding sea and mountain survival training for space crew in Sevastopol. "It is also planned to revive a cosmonauts' post-flight rehabilitation center near Yevpatoria,” the press release noted.

If this plan goes forward, it wouldn’t be the first time that Russia has used its monopoly on transportation to and from the ISS to demand a US sanction of Russia’s actions in Ukraine. In May of this year, Russia’s deputy Prime Minister Dmitry Rogozin announced that Russia would not cooperate with the US on the ISS after 2020, nor would it continue selling its NK-33 and RD-180 rocket engines to the US.