I was just going by what I've seen on
Star Trek. The Klingons always refer to tactical officers as "weapons officers." Memory Alpha also notes this in its article for "tactical officer" (
http://en.memory-alpha.org/wiki/Tactical_officer). I really like your interpretation, though.
Could I use
-'a' to indicate a department head? For example,
QeDpIn'a' for "Chief Science Officer?" I wasn't sure if the word indicated a general officer in that department or the leader of the department, because it features
pIn ("boss," which I know is slang for an expert).