1) Yes there was an update. It’s unrealistic to believe that it’s a special ability to preheat torpedo since that was something they are trained in doing. However when forcing them to work harder than they usually do, that would be an extraordinary skill. Also exchanging the torpedo from the external reserve was a very lengthy and very serious process. If you haven’t done it yet it’s awesome. It stops your boat dead in the water while crew moves the torp, even after it is moved you stay immobile to simulate the tools being placed back in the boat!
2) as far as hydrophone contacts, it’s very unrealistic to have a button that automatically sends this information to your TDC. You listen for a contact you have to manually input this information yourself. As far as the operator goes, the game limits him, but gives you the advantage of hearing far out. A perk for doing it yourself. TWoS prides itself on realism, and gives the player a few perks for doing things the hard way!
As far as accuracy goes with the hydrophone, it takes time and experience to get there. It’s not a precise tool, so don’t expect to be surgical with it. It’s a tool to give you an idea where the target maybe.
Here is a video I did for SH3. It talks about triggers, ignore these, as SH5 has different triggers, but the method is the same:
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