I got a phone call from Annapolis yesterday and an officer told me that he had a couple questions for me. He proceeded to ask me if I had toured and if I was accepted, if I would attend. I told him I would and that Navy was my first choice and he responded by saying that they would like to offer me a letter of assurance and to apply to the VP to raise my chances of getting a nom. Is this an official LOA? Will I receive anything in the mail? I have never heard of an LOA coming via phone before.