So I have a pair of soviet sailors that I'm delay-classing.
They are level 32, and have the normal national sailor abilities - torpedo and gun. The SN 2x 5.1" SD-2 guns seem to only require "SN gun" ability, not "SN heavy gun". I made sure of that, and the nationalities match, too.
The problem is, I still get the unmatched ability warning. Am I missing something obvious?