My races paranoia proved realistic.
Soon after discovering the first alien civilization, the Mirabar Empire, as they call themselves, only 2 jumps from Sol, my 1st Exploration fleet was intercepted by 3 alien vessels. all 3 ships were 6200 tons, although one ship got a different classification than the other 2. They moved at around 3800km/s, giving my fleet an advantage of speed, at 5000km/s
At first, they seemed harmless enough, albeit annoyingly curious.
They stalked my fleet, as it went from one survey point to the next, coming to a halt a uncomfortable 20k km from my fleet as it stopped to survey a location.
20 or so days passed, with my fleet doing nothing wrong, except being in their system, and using active sensors, when suddenly the alien fleet moved away from my fleet, to come to a halt at 3m km, and started firing salvos of 1x3 + 2x6 size 4 missiles at my fleet. My ECM 6 must have really hurt their FC, for them to fire anti-ship missiles from that close.
The first wave of missiles caught me unprepared, for I had forgot to set them to autofire.
However, my gauss cannons did respond, and managed to take out all of the 15 missiles from the salvo.
I immediatly set the aliens to hostile, and my AMM launchers started spitting out their missiles.
It was complete overkill on the incoming enemy missiles, so I soon shut down most of the AMM missile launchers, keeping only 2 launchers active.
I figured my gauss cannons would take care of any missiles that came through, and this way I would save on ammo.
Some minutes into the battle, my MIRV missile separated from it's second stage, and 12 strenght 4 missiles proceeded to the enemy ship that had an active sensor.
Not much later, it was hit by 12 missiles, taking out it's FC or 3 missile launchers, and reducing it's speed to 2000km/s.
The alien ships seemed to have no anti-missile capability whatsoever.
Having 3 less incoming missiles to worry about, I ordered my fleet to advance to the enemy.
Not soon after that, the alien ships ran out of missiles. It proved wise, to have shut down most launchers, as I was almost out of ammo myself.
I fired the remaining AMM missiles at one of the other enemy ships, and proceeded full speed towards the wounded sensor ship.
I finished it at point blank range, using my Gauss cannons.
A second alien ship met the same fate some 10 minutes later, as I caught up with it.
The last alien ship was kind enough to save me some fuel, by moving into my point blank range, as it tried to pick up survivors from the other ship.
Performace of my exploration fleet in it's first encounter was admirable. However, lack of AMM ammo would be a problem in larger engagements. My new design already has double the ammo capacity as the original Girlscout, but it seems it still is not quite enough.