if we want to do realistic SINKEX, i think it's should be divided into 2 forces, Blue team and Red team, our naval forces are on the Blue team, meanwhile the Red team consist of active and moving target, it could be a multiple barged towed a couple hundreds of meter away from the tug boat or even BLOS Remote controlled ship or on autopilot on certain naval maneuvers.
The start of the story is our submarine asset detected and shadowed unknown multiple targets, reported it to the base and Blue team forces heading to Red teams position and trying to block their advancement.
Suddenly, when Blue team's Naval Air Asset picked up a convoi of Red team in just 100nm away from Blue team's position, the Red team forces able and should fire multiple AShM and a swarm of Kamikaze Drones with dud warheard and skimming againts Blue team. This is where Blue Teams AA missile and CIWS tested. and returned fire with live munition and torpedo.
This kind of Live Sinkex should be done in southwest side of Sumatra island / in southwest of Indian Ocean or maybe on the north/northeast of Maluku and Papua island, where the marine traffic is less and the weather is challenging.
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