They are ~all~ correct...
It somewhat depends upon the mod used, if any, and how the "UpgradeClass=" for the subs are set, and several similar settings for the player and career. Ducimus had a post a good while back about poor, good, and excellent single patrols, their scores and how they affected not only the career score, but also equipment upgrades and getting new boats (I cannot find the link to the post yet). If you do well enough, you can "buy" your way into more patrols for a longer career by use of your renown. But if you do poorly - sometimes on just one patrol - and you might be told to "retire". Medium-level scores will get you out of the game, but 'honorably' with a stint in BuOrd, or the New London Sub School, or maybe admin staff at Pearl, but the game still ends there. They do seem to do good with the "simulation" of career length variability in SH4...
One of the problems we've noticed with not only Fall of the Rising Sun Ultimate, but other major mods (and Stock) is that if you do too well early, you might be assigned a new boat, but it will be just prior to the boat's actual availability in-game. For whatever reason, you get assigned the boat, and then retired. It appears to have to do with the fact that there are no assigned patrols for the "early" boat given to the player. So we've been noodling with ways of preventing such in FotRSU. It is a tough situation to test for though... You have to do well with patrols, and I seem to never be able to get past a few patrols before I'm sunk...
