The Navy, in its effort to be different from everyone else, awards them every 4 years.GCM's are awarded every 3 years for good conduct. His "6" add up.
Lindy, you should know that as SOF support.
Agree with your last sentence......
2c
The Good Conduct Medal is awarded to any active-duty enlisted member of the United States military who completes three (or, in the Navy, four) consecutive years of "honorable and faithful service"