Hello. While being extremely close to the enemy ships they go invisible. It happened with a destroyer as you can see in the picture, as well as with a battleship which was 4.5km away from me. He was just strolling away while blowing up my ship.
As for the destroyer, I shot blindly only to find out he was 2.4km away from me; no smoke was active in the cap circle and I had a friendly shooting at the destroyer, which should've kept him spotted. Also as you can see from the picture I was "spotted" which should mean I spot the enemy destroyer myself, otherwise where's the fun. When can we buy invisi-paint from the docks?