
A-ECS : Anti-ECS
I'm sure it's not a gas sniffer <g>
If you look at the used launch platform imho seems it's externally guided.
The second Missile was a RF Type.
ECS: Electronic Camouflage System.
Optical / Probably works with holograms that produce a 3D projection of the surrounding overlayed on the object that needs to be hidden.
Not sure if it incorporates ECM as well.
-Would need a lot of computerpower.
I'm not in for bending light stuff atm. feel free to convince me.
ECCS: Electronic Counter Camouflage System or Sensor.
EMFC: Electromagnetic Flow Control, a experimental technique to enhance submarine acoustic stealth.
The above is (hopefully) prone to change...