HS Papanikolis (S-114)
Hardhead was decommissioned, struck from the Naval Register, and transferred (sold) under the terms of the Security Assistance Program to Greece, 26 July 1972. She was commissioned into the Hellenic Navy as HS Papanikolis (S-114) She was struck from the Greek Naval rolls in 1993.
Read more about this topic: USS Hardhead (SS-365)