In that case it's vastly underarmed for its size.
At more than 200m it should be double ended.
We can say so that the ship got a greater arms package, before the fighting.
We can call it Batch 2
The question is, what kind of armament, she will have got in Batch 2?
The stern gun is a 155mm single MK 3 uses same amount of space as the front 155m twin MK3, there is room for a 155mm Twin MK3 on the aft deck instead of 155mm single MK3.
Where the two 76 mm is on the fore deck there is also room for an extra Missile Launcher or possibly a 155mm Twin MK 3
Looks to me that the boat was built with 3 * Twin 155mm MK 1 and even then there is room for one Missile Launcher.