The Bunker Group
No it's not three subs at the same moment, not event two. It's still one Submarine at the time. They just doing in progressively. Just like when they are building PKR. They're doing it one vessel at the time, however when one vessels already finish one stage and moving to next stage, they are using facilities of previous stage for another vessel.even three submarines at the same moment!
It's just regular manufacturing process. However it's not doing two vessels at the time (pararel time) just like some Enthusiasts claim.