"Paul J. Adam" wrote in message
...
Done thirty years ago with assorted single launchers (basically just a
rail and a stand) to point a 107mm or 122mm rocket targetwards, and a
countdown timer to fire it minutes or hours after the guerilla has
departed.

If you're lucky then you can plant it on the hospital roof, across the
street from the orphanage and next door to the elementary school, and
tip off the news crews so that any enemy counterbattery fire is widely
reported.

Of course, how hard would it be to add GPS guidance to a Katyusha rocket? If
you could bring the CEP down to 10m or so and still have a warhead of 10kg
(the 122mm Katyusha has a 20kg warhead so this is at least plausible), you'd
have a very, very nasty weapon for insurgents (target checkpoints, the
people trying to evac the victims of the latest road-side bomb, etc.) or
terrorists (target parked commercial aircraft at a gate, the 50-yard line at
the Super bowl, etc.).

The Katyusha has a range of around 20km so the only defense would be hard
cover (tough to arrange everywhere), active defenses (which have yet to be
fielded), or GPS-spoofing. The last is possible but it diminishes the
usefulness of GPS for your side as well.