Where can I find a timeline for upgrades?
 

One thing driving me nuts is that unlike SH3, there is no upgrade timeline.

Has anyone made a guide basically laying out all the upgrades for each sub? Each patrol I return hoping for something new, but its a crapshoot when you don't even know when you'll get new torpedoes, conning towers, AA guns, etc.

As some people said, I miss the upgrade system in SH3, how you could upgrade LOTS of aspects of your boat- speed, hydrophones, antisonar coatings, and better decoys. None of that is in this game :down:

upgrades
 

just ran a search for "upgrade dates"
here is one of many results
http://www.subsim.com/radioroom/show...=upgrade+dates

Someone please correct me if I'm wrong, but isn't this slightly reminiscent of real life? Did WWII sub skippers know that new fish and guns were coming out and when to expect them? Just wondering.

Absolutely right! One of the greatest PITA issues to skippers was not knowing when/if new ordinance/weapons/radar were going to be available. Usually it wasn't until a refit in port that they were notified...

Much to the annoyance of skippers like O'Kane and Fluckey who wanted to get right back into the fight asap and "didn't have time" for major refits...

@incubus: As far as upgrading sub systems, you might want to look into the Real Fleet Boat mod, or Trigger Maru if you haven't already. Quite a number of realism issues have been addressed...

Cheers!

Just in case you still want to know...
 

Here's a nice upgrade list done by Excalibur Bane that should tell you everything you want to know.

http://www.subsim.com/radioroom/showthread.php?t=118015