> Look at the geography. There's only 20km of water between Helsinki and Tallinn. If those countries act together they can cut off sea access to St. Petersburg.

> Look at the geography. There's only 20km of water between Helsinki and Tallinn. If those countries act together they can cut off sea access to St. Petersburg. Closer to 90km. If it was 20, all ships to/from St Petersburg would have to pass through Estonian/Finnish territorial waters and we wouldn’t have questions around jurisdiction.