To be clear, I am not talking about him speaking with his university assigned academic adviser. I am talking about the Navy LT that he should be meeting with 2x (minimum by regulation) per semester. And given his current status, it should likely be more often.
That LT is absolutely allowed to talk about Navy career advice - which is what your son is seeking (his talk of enlisting in the Navy, correct?). From the Regulations for Officer Development (para 3-4):
The NROTC instructor shall use these counseling sessions and other situations to accomplish the following officer adviser responsibilities: (7) Provide information on Naval Service career options and service assignment procedures.
I am copying and pasting this into a text to him right now. This is the problem I feel I have in communicating with him: he’s 19 and on a rigorous schedule and I’m being the nagging mom trying to make sure his young brain understands the brevity of his situation and the responsibility he has as an acting adult so I definitely appreciate the straight talk I’m getting here. His father hasn’t even spoken to him because he’s upset with him, knows he can do better. So thank you very much for your timely responses. I will get this advice to him.