Triangulation, an early objective in Modern Warfare 4’s DMZ mode, is conceptually simple: climb radio towers and place transmitters. The part that can stall an otherwise quick mission is that the interaction point is not especially obvious, and the objective does not require players to carry a transmitter item in their inventory.
The reliable method is to reach the very top of a radio tower, turn toward one of the metal uprights forming the tower’s structure, and use the placement prompt when it appears. Do that at two different towers for the initial part of the objective. A subsequent step directs players to La Grand Vie in Songdo Wharf, east of Hajin, where the same basic interaction is used again.
Triangulation is part of the Underground chapter, so it is worth getting the details right rather than spending an extraction wandering around a tower that cannot progress the task.
Triangulation transmitter steps at a glance
- Locate a radio tower in the DMZ map.
- Approach its ladder from the usable side and climb it.
- Continue until the character cannot climb any higher.
- At the top, face a metal support pole in the tower framework.
- Use the on-screen prompt to place the transmitter.
- Repeat the process at a second, different radio tower.
- For the follow-up, travel to the roof of La Grand Vie in Songdo Wharf, east of Hajin, and interact there as directed.
Where to look for radio towers
Radio towers are spread across the DMZ map, so Triangulation is less about uncovering a single fixed landmark than recognizing the right kind of structure and choosing an efficient route. The towers are tall enough to be spotted from a distance, which makes them useful visual targets once players are in the appropriate area.
Several towers can be found relatively near one another in a lower-risk portion of the map. That makes it practical to choose nearby towers rather than attempting a long crossing merely to reach a particular one. Because the order specifically needs two different towers, proximity matters: using a pair that can be completed in one route cuts down on travel time and on the number of fights that might interrupt the climb.
“Typically unguarded” does not mean completely safe. Random patrols may still be present. A tower also leaves a climbing player exposed and limits their ability to react, so clearing or checking the immediate area before committing to the ladder is the sensible approach. The goal is not a prolonged tower defense; it is to reach the top, trigger the prompt, and move on.
Players working through other DMZ resource tasks may also want to plan the run around nearby objectives. Our Haneul Reactor power regulator farming and 3D printer guide covers a separate DMZ activity that can help with that broader route planning.
How to trigger the transmitter placement prompt
The key detail is placement location. Reaching the tower is not sufficient, and the prompt is not described as appearing anywhere along the climb. Go all the way up until further climbing is impossible. Then orient the character toward one of the metal poles at the top of the tower.
Related coverage includes Modern Warfare 4 DMZ Triangulation Guide: How to Place Transmitters on Radio Towers.
That is where the interaction prompt should appear. Use it to register a transmitter placement. There is no separate “transmitter” pickup or inventory object to find beforehand; the objective supplies the interaction as part of the mission flow. Searching loot containers for a physical transmitter will therefore not solve a missing prompt.
If the prompt does not show up
First, confirm that the character is at the absolute top of the ladder rather than on a lower segment. Then adjust the camera and face a different metal upright at the tower’s crown. The intended interaction is tied to the tower’s upper structure, not simply to being on the tower.
It is also important to distinguish a tower that looks correct from a tower already used for the objective. The requirement is two different radio towers. If one placement has registered but progression has not updated after another attempt, move to another tower rather than repeatedly trying the same structure.
Why two separate towers matter
Triangulation uses a familiar mission-game design: separate locations confirm separate interaction events. In practical terms, this means a successful first placement is only half of the opening tower requirement. The second transmitter must be installed at another tower, even if the first site is convenient and quiet.
This is why a small cluster of visible towers is more valuable than a single easily accessible one. A player can finish one climb, travel to the next structure, repeat the top-of-tower interaction, and reduce the chance of confusing a repeated attempt with mission progress.
The name “Triangulation” also helps explain the structure at a high level. Triangulation generally means determining or refining a position using signals or measurements from multiple points. The mission uses radio towers as those points, though players do not need to perform any technical calculation themselves. Their job is simply to activate the relevant placements at the designated structures.
The La Grand Vie follow-up in Songdo Wharf
After the two tower placements, the objective flow points to La Grand Vie in Songdo Wharf. This named location is east of Hajin. Use the map to find the building, then head to its top rather than searching the surrounding streets for another tower.
The instruction is to perform the placement process once more at the top of La Grand Vie. Treat this as a distinct location-based follow-up: it comes after the two separate radio tower interactions, and it is not a reason to revisit one of the earlier towers.
The available mission details do not establish additional item requirements, enemy spawns, rewards, or every possible tower position on the map. What is clear is the route structure: two unique radio towers first, followed by the La Grand Vie rooftop objective in Songdo Wharf.
A practical route and survival checklist
- Prioritize nearby towers: The map contains multiple radio towers, so select a pair you can see or reach without a lengthy detour.
- Scan before climbing: Towers may be unguarded, but patrols can pass through the area.
- Use the correct ladder side: If the character will not begin climbing, reposition at the ladder.
- Climb to the limit: Do not look for the placement prompt midway up.
- Face the upper metal framework: Aim at a support pole at the top until the interaction becomes available.
- Do not hunt for an item: No transmitter inventory item is needed for the placement prompt.
- Change towers after the first placement: The early requirement is explicitly for two different radio towers.
- Read the map for the final step: La Grand Vie is in Songdo Wharf, east of Hajin, and the relevant point is on top of the building.
Common Triangulation mistakes to avoid
The most likely error is treating the tower climb itself as the objective. It is only the route to the actual interaction. At the ladder’s highest point, pause and look directly at the tower’s metal uprights; that is the small positional requirement the objective leaves underexplained.
A second mistake is assuming the word “transmitter” means a mission item must be acquired first. Here it refers to the placement action. If the player is at the correct top-of-tower position, the game should offer the relevant prompt without a transmitter being carried.
Finally, do not overlook the distinction between two towers and the later La Grand Vie step. The first portion asks for two different radio tower placements. Once both are complete, the mission flow sends players to a named building rooftop in Songdo Wharf. Following that sequence keeps the task focused and avoids unnecessary searches of the wider map.
