This mission is exclusive to AL Mazrah, and you must drop into the Exclusion Zone to initiate it. Once you’re there, the mission begins. The primary objective of Dark Water is to locate a Rebreather, a Field Upgrade in the game. You can find it in medicine cabinets and hospitals, typically in areas where Gas Mask or Self-Revive items are available.
After acquiring the Rebreather, the first part of the mission is complete. Now, your task is to find the Cartel Warehouse Key, located in the easternmost sunken ship in Al Mazrah. Note that this might be confusing if you’re only focusing on the eastern part of the map—it’s actually in the southeastern seas.
Refer to the image below for the precise location of the sunken ship in Cod WZ.
Go to the location to discover the ship. Make sure that you have the Rebreather equipped because you will require it to complete the mission. Now, dive underwater, and you will see a big gap in the ship’s body. Enter through the big gap, then turn left and continue going forward. At the end of the path, you will see a desk where you will find the Cartel Warehouse Key. After getting the key, exit the ship from the same path you took to enter.
Now, head to Hadif port and find the blue warehouse, as shown in the image above.
You’ll know you’re in the right place when you encounter a locked door. Utilize the Cartel Warehouse Key to open the warehouse. Inside, on the shelves, you’ll discover the Las Almas laptop. Grab the laptop and proceed to escape from the map. This concludes the Dark Water Mission.