Not even close to the actual intelligence structure. The nsa doesn't have to answer to dod at ALL.

Hurr durr the military is the state, you have no clue what you're talking about. I served for 6 years doing naval intelligence, sigint, and we never once heard from nsa, cia, fbi, etc. All our orders came from one of two generals in charge of our task force.

Nuclear subs night have to work with intel agencies for technical purposes, but I never served on one.