Around 1995 the Navy changed to every three years for the GCM. You're correct, after the first award they are rarely presented at an awards ceremony.
Thanks for the correction!
Now it's THREE?
I'd already retired----WTF is my Navy coming to?
As for the subsequent awards---I usually received a memo "Authorizing" me to wear the star in lieu of an additional award.
I know the Army gives the GCM for 3 years---I guess that was why they changed it. After 130-odd years you'd think they would just leave it alone.
*sigh*