I would venture to say that this is contrary to most of the opinions and advice here, and I have not heard about any ask-a-Navy officer resource. I think something has gotten lost in translation.
Letters of recommendation have the most impact from someone who actually knows the applicant, and can speak to character, work ethic, positive traits, specific personal knowledge of the individual. We have many who post here that say have gotten a letter from some admiral, but that means very little unless that person can sincerely write something like, “I have known Davey Jones since he was 10/from working with him in Sea Cadets/from his Eagle Scout project and he impressed me with ….” and goes in to relate personal, powerful and positive observations. Those help the SA gain insight into some aspect of the candidate from someone who knows him.