Here is a list of where the sensors are:

1. Outside the door leading to Strut D of Shell 1, above Raiden's starting
* position. (Move north, turn around, go into FPV and look up to see it.)

2. South of the south-most set of IR sensors on the floor to the left.

3. South of the north-most set of IR sensors on the floor to the left. Be
* careful that you don't shoot a bullet though the sensors of the southern set
*when trying to get this - use the Thermal Goggles.

4. On the tank just north of the sets of IR sensors, facing south.

5. Northwest of the northern tank (near Shell G) on the floor in the corner.

6. Behind the Sons of Liberty flag flying to the west. (Every once in a while
* the flag will flap forward a bit, giving you a quick glance of the panel.)

7. On the wall of Strut G, left of the entrance, facing south.

8. On the wall of Strut G, further right of the entrance, facing south.

9. On the small platform above the pipe that connects to Shell G and D. The
* pipe is on the right side of the bridge and a few feet lower than it. The
* sensor is surrounded by birds when you first enter, making it difficult to
* see (though, you should notice the flock of half a dozen seagulls). Shoot a
* bullet in the area and the birds will fly away. (Careful not to hit too
* many birds or the Colonel and Rose will scold you!)

10. On top of the cypher which is hovering above Strut G (Shell 2). Do NOT
* shoot down the cypher - it too is loaded with explosives. Only shoot the
* control panel. It moves fairly often, pausing for a second or two and
* the changing direction. I suggest finding a spot where it stops, aim the
* rifle at that position and wait for it to return, rather than risking it.

11. On the bottom of the balcony of Strut D. To see it, you'll have to go on
* or down the stairs and face Strut D. It will be on the east (or Raiden's
* left when facing Strut D) side, on the large box structure next to the pipe
* that connects Strut D and G.

12. On the lower level of the 1-2 Bridge. The only way to see it is to go into
* one of the wings of the balcony, go into the upper corner and look at the
* center of the lower portion of the bridge in FPV. Now, hold the L2 and R2
* buttons and Raiden will get on his tip-toes and you'll be able to see it.
* You can only see it while you are hold L2 and R2, so you'll have to fire
* while holding them too. (You obviously cannot use the PSG1 - use the SOCOM.)

Hope this Helps!