Note: If you haven't sunk Brothers-in-Arms yet, initiate combat with them and only focus on sinking one ship. After sinking that one ship, collect the loot and then allow yourself to fail. Once you respawn you'll notice that the ship is back in place. You can then proceed to once again destroy only one ship and loot it, then restart the event-- all while keeping the money obtained. Feel free to repeat this process as often as you like for 10,000R each time, making Brothers-in-Arms a terrific benefactor. Upgrading your cannon, shot, chain shot, and ram abilities is recommended so you take down the ship faster.