[ARC5] The Army Ship that became another Navy ARC-5? ... and ARINC?

[gordon white]

I have been of the impression that ARC as in military nomenclature was
coined after the AN - (Joint Army-Navy)  nomenclature was adopted. If
the ARC-1 had that name earlier, it was a coincidence. A.R.C. had no
relationship to the nomenclature AN/ARC at all. Another coincidence.
        - Gordon