When trying to find traps, bad guys using stealth or lazers. Use the Thermo Goggles.
You can find these i the open room, off the first floor in the tank hanger (look out for the security camera).
Also, if wanting to take out enemies from afar, use the Nikita Missile (remote control). (You can press TRIANGLE to get the Missile First Person Mode, which makes it more accurate.)
The enemies won't find you because they will go to the explosion, not to where you are!
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