Where In The Fallout 2 World Is The Friend Or Foe Transponder?

If you're asking, that means it aint there.

If it's an actual quest item in-game, then you need to know that FO2 is an unusually buggy game, and that you may need to download a player-made patch before it becomes fixed.

i found it now yeah my game is patched too

Commanders room Navarro right?

No My Game Gliched It Was Already Installed into the tanker