The Master Cartographer title in Sea of Thieves takes work, but it's worth it if you want to show off and stand out from your fellow pirates. If you want to consider yourself a master of treasure hiding, you might very well want to add this title to your collection.
A cartographer is a cartographer, and having the title of master cartographer, logically enough, requires you to make maps. Lots of cards. Your task is to create and post 25 cards on the quest board. It's a multi-part process, but it has a few quirks that can make it more or less difficult, so we'll break it down step by step.
Step 1: Find treasure
This part is quite simple, find some loot! Find treasure any way you want, whether it's maps, slaying Skeleton Captains, digging into shrines, or just plain dumb luck. Either way, you need to find something valuable.
Step 2: bury it
You can bury treasure on any soft ground using your shovel's alternate function. This will create a treasure map on each island to store loot. However, when creating maps, there is an important caveat: outposts do not count.
It would be too easy to find maps in these starting areas, so outpost maps cannot be displayed.
Step 3: Publish your map
The cards you originally created exist on your card table as a set of cards. Your job now is to reach a Seapost or Outpost and post them on the quest board. But beware, if you're sunk, the cards will float to the surface, ready to be stolen by any enterprising crew.
Step 4: Repeat!
In general, each island you visit and bury treasure is good for a map. As stated above, you need to post 25 cards in total, so expect to repeat that effort. The fastest option would be to bury a single piece of loot on multiple islands to create a large number of maps, then deliver them in batches to the quest board. Just keep repeating this process until you've reached 25 published maps, and the master cartographer will be yours.
Alright Master Cartographer, you have perfected the art of creating maps for other crews. For more nuance on players' buried treasure, be sure to check out our full Buried to Buried Treasure.
If that's not enough to quench your thirst for pirate adventures, we've got plenty more tips for your next voyage in our Sea of Thieves guides hub.