Substantial Findings is a Black Mous faction mission in MW2 DMZ mode whose objectives take you to Al-Mazrah and Ashika Island. While the mission seems straightforward, it is not, as it asks you to obtain trackers from dead drops that are hard to find and asks you to place the trackers on Submarines, which, again, you may fail to find. 

To make things easier for you, we have prepared this handy guide that walks you through the Substantial Findings faction mission and explains how you can complete it in MW2 DMZ. 

Related | All Police Station Locations in Warzone 2 DMZ

All Dead Drops and Submarine Locations in Substantial Findings Mission in DMZ

To complete the Substantial Findings Black Mous faction mission in MW2 DMZ mode, you must find and use the dead drops at Al Sharim Pass and Town Center dead drops and then place them on Submarines docked at Hafid Port and in the Ashika Island Waterways. 

Here is a map screenshot that shares the location of the Al Sharim Pass dead drop from where you can obtain the said tracker:

Assuming you managed to find the tracker, use the below map screenshot to reach the Hafid Port Submarine location:

For the Submarine located at the Ashika Island Waterways, you must start a new DMZ match and obtain the tracker from Town Center dead drop. 

Once the game begins, you must make your way to the Waterways, which is located in the south part of the game map at Port Ashika. And then place the tracker on the Submarine to complete the faction mission. 

That concludes our guide on how to complete the Substantial Findings mission in DMZ.

MW2 DMZ mode is available on Xbox Series X|S, PlayStation 5, and PC platforms. For more on MW2 DMZ, check out our dedicated MW2 and DMZ sections.