My fiance did too
They are in Charlie 186 (company). Type in USCG Charlie 186 on the search box. I HIGHLY reccomend joining it! They have the address listed under documents and anything and everything you could want to know. Also, my fiance's family just received their letter stating what he will be doing each week and things about graduation. Not a personal letter, just an automated one from the Coast Guard. So I am sure you will be getting one soon too. Hope this helps!