My grandad, Frederick Day, served with "a Marine Transport Squadron" in the South Pacific. I haven't found anything of his with the actual squadron designation on it. He received a Bronze Star for setting up some type of radio beacon... but he doesn't like to talk about any of his experiences.
Besides the Post Traumatic Stress Disorder, I wonder if a lot of these WWII vets are still affected by the high level of classification some of their gear must have had back then.
I haven't been able to find any information on USMC operations involving radio beacons in the Pacific during the war.