HMCS is the my retired Navy rank and rating - Senior Chief Hospital Corpsman (a Navy Medic, E8). FMF - Fleet Marine Force, was my warfare designator (specialized in working with the Marines....and spent all my operational career assigned to Marine units). My avatar is a Navy camouflage uniform with the FMF badge. I still love the Marines an tend to identify myself more with them than the Navy. No disrespect to the Navy, but I feel at home with the Marines.