How to find and use Marathon DCONs

Marathon playing opening DCON — (Image credit: Bungie)

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Perimeter
Dire Marsh
Outpost
How to use a DCON

Marathon DCONs are small machines for teleporting items, and they come up a lot in contracts, so knowing where to find them on the various maps is essential. The main problem is that these DCON devices are only sometimes visibly marked in Marathon, though this could actually be a bug. Regardless, they're always in the same places on every map, so here are all the DCON locations in Marathon below so you know where to go to complete your contracts.

Marathon DCON locations

Marathon DCON machine on roof of a building in perimeter — (Image credit: Bungie)

DCONs are found outside or on top buildings in and around a few major POIs on all Marathon maps. When you get close to a DCON, you should see a black and white icon pointing you to its precise location, but it's sadly nowhere near as generous as the markers in the Marathon Welcome to Tau Ceti mission. Knowing to find them on all maps will help you with contracts such as the Marathon Parasitism priority contract chain for Sekiguchi.

Here's where to look on Perimeter, Dire Marsh, and Outpost:

Perimeter DCON locations

Marathon DCON map for Perimeter — (Image credit: Bungie)

West-northwest of the main North Relay area, right in the northwest corner of the whole map.
In the area full of rock formations and colony vehicles to the northeast of Station.
Way south of the main South Relay area on the very edge of Perimeter
On the western edge of Overflow at the end of a walkway from the main structure.

Dire Marsh DCON locations

Marathon DCON map for Dire Marsh — (Image credit: Bungie)

Northwest of the main Greenhouse structure near the hills on the edge of the map.
In the middle of the marsh at the south end of Complex and east of AI Uplink – it's pretty much the southeast corner of Dire Marsh.
In a marshy area roughly southwest of the main building in Quarantine.

Outpost DCON locations

Marathon DCON locations on Outpost marked on map — (Image credit: Bungie)

In the middle of the western Airfield hangar where the large roof hatch is.
Outside the northeastern edge of the southeastern building in Orientation.
Outside the southeast corner of the central Processing building.

How to use a DCON in Marathon

Marathon placing item in DCON inventory menu — (Image credit: Bungie)

Once you've found a Marathon DCON, interact with it to open its inventory, click and drag (controller players need to press L2/LT to pick up and drop inventory items) any required items from your inventory into the DCON's inventory, then close the menu and the machine will get to work teleporting your goods elsewhere. Hopefully this will complete whatever contract you had for one of the Marathon factions, such as the Equitable Distribution series of priority contracts for Traxus.

DCONs can be used as many times as necessary in a single run, so you don't necessarily have to drop off everything a contract requires in one go during a run. You could even do it across multiple runs unless your contract states otherwise. Just be aware that items that go into a DCON are never seen again, so there's no other use for them other than for fulfilling contracts.

As you're looking for DCONs, you may also come across Marathon Tox Clear rooms full of loot, but you need a special override key to disable the gas and make the room safe to loot.