All perfectly clear, Chien Rouge. Read up and talk to the oldest and wisest engineer you can find... all will be made known to you (can't post it here, all very hush-hush... I got it from an old pilot).
The Caspian, where Baku is located, is about 20-30m below sea level. A canal between it and the Black Sea was proposed this summer to perhaps make those nations bordering the Caspian maritime states. So far, nothing... ergo, sea transport is a non-starter. It's also a major pain for the poor engineers who have to reassemble the thing dockside so it can be flown to its final destination.
As for air transport in a freighter. Depends. Sometimes the machines are moved by air freight. How much will it cost, etc. Ferry flights are one of the last great adventures... I hope they never go away.