Pointblank
Senior Member
We're not starting with a high end sub. What you got is essentially a Barbel class for god's sake. Those subs were being made pre 1960. You don't need a high tech base to build the sub alone. Sonars, control and command systems, polymers for the elastic coatings, adhesives for the tiles, these are something, but nonetheless are obtainable through means that can plausibly deniable.
Cost is irrelevant, freedom has no price tag. If the PLA overruns Taiwan, you can say to the money accountant I lost because I'm too cheap to insist on making a sub on my own when no one wants to sell me.
As I said, the issue is with systems integration. Is the wiring capable of handling the power requirements? Is the generator of the right type? Is the fire control computer and the combat system compatible? Is the is the sonar set compatible with the combat system and the sonar processors? This requires expertise that the Taiwanese do not have because they don't build submarines. Nations that have tried to build somewhat advanced submarines from scratch receive tons of technical assistance to help with the designing, building, and testing of the submarines. Someone has to hand them the blueprints. Someone has to explain and show the technicians how to hook things up. Someone has to explain and show the technicians how things should be laid out. The flow of data and personnel expertise will be noticed; if someone from GD Electric Boat or Northrop Grumman Newport News was in Taiwan and if it is confirmed Taiwan is building submarines, you can bet the Chinese would protest to the Americans. You cannot hide the flow of expertise and information that easily. Any decent intelligence agency will pick up the movement of such people and information pretty quickly.