Seriously, this was absolute clear provocation from Ukrainian side. If they didn't want to escalate the whole situations, their ships should NOT enter the disputed territorial waters before all things would be cleared. They have a tanker in support, so the fuel was not an issue. Instead, two 30-ton river gunboats and old harbor tug tried to force their way through the strait, despite the repeated warnings to NOT do that. If it isn't provocation, WHAT IT IS?
Moreover, while remaining in disputed waters, they started to train their gun mounts on Russian Board Guard ships. I wonder, what would USN do with, say, Iranian ship, which entered US coastal waters without permission and started to lock its weapon on US Coast Guard vessels?

Basically, some idiotic Ukrainian admiral decided to organize a little bit of provocation. And the reason is pretty clear; the Poroshenko is extremely unpopular, and most likely lose the soon-to-come President elections. Declaring the state of emergency, he could brush aside around this pesky little "democracy" and stay in power as long as he wanted.
P.S. Obviously, the Ukrainian Rada (parlament) suspected exactly that, because they did NOT support the 60-day emergency, suggested by President, and actually accused him of striving for dictatorship.
