I have spent many happy hours listening to Aaron talk about his experiences serving on submarines on YouTube and Twitch. He used to go by JiveTurkey then rebranded to SubBrief.
Side note, if anyone has watched The Hunt For Red October and thought "why can't I do this in a video game?" definitely pick up Cold Waters. The core gameplay loop isn't for everyone (depending on difficulty and era it can involve a lot of slow-paced stealthing around) but for me it's a ton of fun.