Well realistically speaking the best Aces of the war didn't even survive 41. Those that did well usually didn't last longer than 8 or so patrols after that since they'd be promoted. Either way, realistically speaking, you shouldn't be Kaleun by the end of the war.
Also if you have been sailing since Sept of 39 then 7 sounds like a good number of patrols. Thats around 2 months for 1 patrol and rest period. It also depends on the boat type. In a II you won't have long patrols.
Also if you're impatient for the later war then just start a new career in 41 or 43 or something and "retire" this one.
__________________
|