“I am not privy to the plans of the Lithuanian navy but they would have to sail out of the Baltic Sea into the North Sea and then to the mouth of the Rhine in the Netherlands and then to Danube, I think.”
A highly circuitous route, which would include negotiating the RMD canal which alone is over 170km in length and possesses 16 locks.
And that’s even before the Danube is reached at Kelheim in Germany!