Equipment Availability Timeline
 

I KNOW that I used to have something on this, but can't locate it. Can someone point me to the documentation of what is available and when? I'm particularly thinking about torps, but wanting to plan all expected upgrades a little better.

The simple but less accurate answer is to click on the ? symbol in the bottom right of the upgrades screen - that gives you approximate dates for each equipment upgrade.

The harder one is to dig through the basic.cfg file where all of the months and years are there in black and white.

But if it is a GWX mod you are using just consult the manual.