Tracker

Ash's Trackers, arguably the most important pieces of Equipment, are available to the Crew player at the beginning of the game, unclaimed at the Bridge Location.

Although a crewmember carrying a Tracker may carry no other Equipment, he or she may act to reveal all decoy Mystery Markers within a span radius of 7 on the same Deck. Revealed decoys are sent to the Alien player's discard deck, while face-down Characters within the span remain on the layout.

Trackers and Ladders
The Tracker will reveal decoy Mystery Markers on Ladders adjacent to the Deck being searched, provided they are within the span radius of 7. When a crewmember uses the Tracker while standing on a Ladder, he must specify which adjacent Deck is being searched.

Trackers and Air Shafts
Since the Tracker is triggered by micro-changes in air density, the Tracker is less effective within Air Shafts. Whenever a crewmember within or adjacent to an Air Shaft uses the Tracker on that Air Shaft, the Alien player need not reveal any decoy Mystery Markers, but must simply tell the Crew player how many of the Mystery Markers within the shaft are decoys, and how many are real Characters.