Take Ukraine Crimea peninsula Sevastopol as the base Russia Black Sea fleet, is controlling the Black Sea big sea area, may deter Bose Pu the Ruse channel and the Black Sea surrounding countries.

• 以乌克兰克里米亚半岛塞瓦斯托波尔为基地的俄黑海舰队，控制着黑海大部海域，可以威慑博斯普鲁斯海峡及黑海周边国家。