Mine Detector
From the Metal Gear Wiki
The Mine Detector is an item used to detect enemy claymore mines when it is equipped. It can be found in all three Metal Gear Solid games. In the first two games, someone disguised as a Cyborg Ninja tells you where to find one just before you encounter the minefield. In the Metal Gear Solid Snake Eater, it can be found in a storage closet.
It functions by displaying the mines field of view on the radar screen. In Metal Gear Solid 3: Snake Eater this changes to a vibration sensor much like the AP Sensor. When Snake gets close to mine the controller vibrates, as Snake gets closer to a mine the vibrations increase.
