Locking onto a radio signal was possible... radio navigation heh.
Sooo, to cut down on the CRAP that goes on with channel 200...
So if a PlayerA is flying along or in tower, and PlayerMOUTH types on 200. PlayerMouth would have, in essence, broadcast his location to all in game! So PlayerA, and everyone else in the game, gets an arrow on the map, pointing towards PlayerMOUTH; and furthermore, the number of dashes behind the arrow indicates how far away... 1 sector per dash.
Summed up, type on 200 and everyone in game gets a vector to your location!
Altitude wasn't given in those days, I believe, not sure, so no info on Altitude.
So...
> would mean within 1 sector to the right.
-> would mean between 1 and 2 sectors to the right.
--> would mean between 2 and 3 sectors to the right.
---> would mean between 3 and 4 sectors away to the right.
----> would mean between 4 and 5 sectors to the right.
<- would mean between 1 and 2 sectors to the left.
x means he is in a tower
g means on the ground soo.. g-> would mean between 1 and 2 sectors to the right.
Homing device for 200 would now mean that players HAVE TO BACK UP THEIR MOUTHS!

would look like this:

How about have one free type per minute?
After that, if two types on 200 per minute and it activates?
*Edit: for towers also! Run mouth on 200 from tower, and someone bombs that tower - BAM a death for all stats!
If didn't type on 200, and bomb hits the tower, then no death... only for mouths typing more than 1 per minute on 200.
Heck with it, add a green dot for if you are higher than PlayerMouth, and a red dot if he is higher?
It would be used to lure enemies if alt not show.
So yeah, on clipboard map, a little arrow with dashes and a dot for every time someone talks more than once per minute on 200.