Han Yu pondered for a moment, then continued, "Although I'm not from the Navy, I do have some understanding of submarines. If it sails back on its own, it needs to pass through the waters of many countries. This means that the submarine's noise characteristics could easily be captured, which is very dangerous for the submarine and unfavorable for maintaining secrecy.
Moreover, like tanks, the main engine, auxiliary engines, batteries, and critical components of submarines all have a service life. Without officially being commissioned, sailing over ten thousand nautical miles will definitely affect the submarine's service life.
Additionally, it's hard to say whether there would be a need to dock for resupply along the way. Warships docking are different from cargo ships docking; it is not conducive to secrecy and may involve some international conventions, even sovereignty issues, which can be quite troublesome."
An expert opens their mouth and shows if they really know.
