Sequence 10–1: Black Bart's Gambit

Optional Missions:

- Stay out of combat

- Use a rope swing to kill the captain

Sail to the marked area, then follow the canal until you find the Portuguese fleet. Jump off ship and slowly swim to the target ship. Once there, climb up the ropes to and get to the top of the mast. To be safe, you can put the gunner on the main mast to sleep then grab the flag, then dive in the water. Swim back to the Jackdaw and continue ahead with the stolen flag waving on top of the Jackdaw as a disguise.

Carefully navigate the canal to avoid raising suspicions. After reaching another ship, you'll have to swim to the shore and find the unloaded cargo. Infiltrating the area won't be a walk in the park. The are several methods you can use to take out the patrols. The most effective ones will be abusing the use of sleep and berserk darts as well as assassinations from stalking areas. Use the berserk darts to create a riot. Just remember to stay in cover just in case a survivor running amok from the berserk darts' effect is looking around. Being spotted by them will instantly trigger combat, thus ruining your attempt to get the first optional objective.

Continue moving until you find two guards in the first chokepoint. It will be better to use a berserk dart on the brute and let him run towards the group of guards around the campfire. Use this chance to pass by and hide in the nearby bushes past the bottleneck. Once you're in the next area, you have to watch out of the patrol and the two brutes. Making these two brutes go berserk can create a diversion long enough for you to go around and reach the marked treasure chest. After successfully looting the chest, head to the shore carefully and the Jackdaw will arrive to pick you up. Board it and reach the wheel to pursue the ship.

While sailing in the canal, stay on the right side because there is a couple of ships blocking the path on the left side. After cartching up with the galleon, you have to swim to the shore again and take out the guards in the watchtowers. You need to do this again covertly so start killing the guards in the outside perimeter. Stay in the stalking areas and learn movement patterns of the patrols. The watchtower guards won't look around so you climb the tower behind them and take them out from behind. Just be careful of the ground patrols nearby; it is still a good move to carefully take out the ground troops before trying to clear the watchtowers.

After taking care of the first watchtower, continue moving along the bushes to encounter two patrol units. Use berserk darts on them while hiding and wait for them to thin out their ranks. Always make the officers go berserk first since they can kill instantly. Continue ahead and clean up the remaining guards before moving on.

Once you've reached the second watchtower, kill the guard there and the second optional mission will be added. You have to use a rope swing to kill the captain of the docked ship nearby – all while maintaining complete stealth. There's a rope in the tower that you can use to swing but make sure that you've cleared the guards below to ensure no one's going to blow your cover. The captain aboard the ship will just walk in a fixed pattern so wait for him to come back, run towards the rope to swing to the ship. Keep mashing the attack button while in mid-air so your attack connects when the prompt appears. Mission complete.