Break off to collect the floating chest
From Create Your Own Story
You order the Midnight to slow down and move in on the floating chest. Within a few minutes, your men have hauled it up and broken it open.
It contains a small amount of gold and silver [which you order split evenly among the crew], some old love letters written by a woman, one "Maria", to a "Captain Raul", and a map with directions to what appears to be a part of a city. The directions are in a code you can't recognize.
Ask Raquel if she can decode the directions
Look more carefully at the love letters
Now that you've recovered the chest, resume your pursuit of the galleon