NAV marker transmitter

The NAV Marker Transmitter is a small ground 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 Spartans during operations, such as the raid on URF Jefferson Station.