I just started my very first SH3 and GWC career and it's on 87% , no manual targeting and events camera for screenshots, but with malfunction/sabotage from SH3Cmd.
Plus, i have my own house rules for more realism possible.I dedicated time learning ropes in single missions and reading manuals before i even tried it, though
Still alive after 2 patrols(i take time so patrol lasts at least 2-3 RL days for me) with 40000+ tons sinked, and no casualties and/or damage.
Reason why i am saying all this is that i believe that manual targeting and map update should count for at least 50% of realism score. It's a quite huge difference with those 2 on.
Now i just need to learn how to manually target, it is eluding me so far hehe