Good morning, Linda Hutcheson !!! (I find that I am responding to two Lindas at the same time...confusing ! )
The data base for inquiries related to burials of military personnel overseas is at , which lists the casualty by name/rank/serial number/enlisted at/died (date)/buried (cemetery, including lot number, plot number.
This same data would apply to a person lost at sea or who was buried there, and would indicate that a memorial plaque existed at a given site which would include the same information.
James Mahaony's name does not appear at www.abmc.gov/, therefore he is not buried or memorialized abroad.
Unless you can locate some unit identity for me to refer to, I guess this is about all I can do with this inquiry. So sorry.