[verity]

I was thinking more in the line of two tubes. Purely speculation on my part.
But I do know for a fact that 107mm rockets have been launched in bunches which is understandable because of their range and lack of need to 'pack up' and scoot.

[Darksheare]

Yes.
Counterbattery fire becomes a higher possibility with the more rounds you fire without moving.
Their best bet as survival would be four mortars.
But it's hard to co-ordinate mortars over distance without them being in the same area.
For effective fire they would need to be co-ordinated.
But I haven't heard whether or not the terrs have done such yet.
It has sounded more like random fire.

Two tubes would make sense, but that still raises the amount of risk.
I'd like to see JStars aircraft circuiting the area and looking to see if any vehicles leave the area where the mortars fired from, and how many vehicles.
It has been rumored that in Afghanistan, the Afghanis mounted a mortar on the back of a pickup truck, and modified it to break down and lay down with a tarp over it all.
A JStars can see a bicycle at almost 100 miles or so, so it'd be neat to see what leaves the area, and watch where it goes.
And then zap it with artillery when it stops.

The donkey cart rocket attacks are interesting as well.
Donkey carts are ubiquious over there, so it is pretty much a 'stealth weapon'.
And doing counterbattery on that is useless.
The one donkey cart 'bomb' that was studied had a timer.
The terrs were long gone before the rockets fired.