You can get this achievement while in an alliance.
You must board a ship who have a map bundle from the new quest board. You can see the bundle siting on the ships quest table. When you approach it you press X to steal it. It will take approx 3 seconds to pick up.
You then have to board your own ship, go to your quest table and press X to place the map bundle. If you already have a map bundle on the table you can combine them together. Combining can be annoying, particulalrly on the sloop. Approach the table from the side and place your crosshair on the bundle. You will get a prompt to press X to combine.