World 1

Stage Guide
The route from D to C is one-way only (you can not move from C to D). All compass spins in this stage are random, keep trying if you're getting detoured to the maelstrom. Do note that F has heavy cruisers and the boss node has a battleship.

Stage Guide
After playing this stage once, you may notice that standard aircraft carriers kind of hurt. For now, your only countermeasures are to pick up a few heavy cruisers in this stage or 1-3 and train them up, or just trying to craft battleships for doing the same, just to push through with firepower and armor. Otherwise, you can try to build your own aircraft carrier and put on fighters of your own to shoot down enemy aircraft. Note that this last suggestion will also help in completing the Akagi quest (A11 and B10).