俄国战舰会无法从圣彼得堡出海。
https://www.express.co.uk/news/world/1654957/vladimir-putin-russia-nato-estonia-finland-baltic-sea-gulf-of-finland-ukraine
https://odessa-journal.com/estonia-offers-finland-and-sweden-to-make-the-baltic-an-internal-sea-of-nato/