The NAV Marker Transmitter[1][2] is a small tracking device of the United Nations Space Command.
They are small devices, relatively the size of a tick, and can be discreetly attached to an object and will Broadcast the location of that object to a nearby UNSC Heads-Up Display calibrated to their frequency.
NAV Marker Transmitters have been used by SPARTAN-IIs during operations, such as the raid on United Rebel Front Jefferson Station.
Appearances
- Halo: The Fall of Reach (First appearance)
- Halo: First Strike