Template:FOF-1 NAV Marker Transmitters[1][2] are tracking devices used by the UNSC. They are small devices, relatively the size of a tick. They can be attached to an object and will broadcast the location of that object to a Heads-Up Display calibrated to their frequency.
NAV Marker Transmitters have been used by Spartans during operations.
- ^ Halo: Fall of Reach
- ^ Halo: First Strike
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