Many thanks for your replies and assistance to my somewhat exasperated post
; it is just that sometimes I get mad seeing good ideas existing in one game (SH3) being removed from sequel for no apparent reason.
Still, a command indicating range left to current fuel state at current speed would clarify things without compromising for realism (I am quite sure that US subs were not going blind in the Pacific following the 10 kts rule
).
I will give the FTT mod a shot, although there are things in it that do not much interest me.