Optional Missions:
- Use the mortar to sink 3 ships
- Use barrels to sink a ship
Before starting this mission, you have to purchase all available upgrades for Jackdaw at this point. Make sure you're fully stocked with mortars and fire barrels as well. Once the mission starts, you have to escort the fireship, The Royal Phoenix. Your self-explanatory optional objectives are indicated immediately at the start of the mission. Use your mortars to destroy the small gunboats. A well-placed and adjusted mortar fire can even take 2-3 boats at once.
For the second optional objective, you have to finish off an enemy ship using fire barrels. The best way to do this is to critically damage a ship - but not enough to incapacitate it. Get close while maneuvering your ship then steer the ship around so that the Jackdaw's rear gets pointed towards the enemy ship. Release your fire barrels at once which should be enough to sink the enemy ship.
Keep destroying enemy ships and protect the fire ship until it hits the blockade. After the blockade has been destroyed, all the enemy ships will come after you. If your ship is fully upgraded, you can accept the challenge and sink them all. Otherwise, turn away from them and make a hasty escape the zone to complete the mission.