This is a royal pain in the bottom. Hopefully, this guide will help. To prevent the ship getting damaged, you need to take a very specific route, and it's a bit tricky. For the mine part, pick the second ship after the blockade. For the fort, you'll need to master stop/starting the boat, because the fort will shoot where would you be, not where you are. good luck! Optional Objectives: Limit the ship's damage: 50% Use a mine to eliminate gunboats Limit damage from the fort's mortars: 50%