1968-In October 1968, the United States Air Force requested additional LORAN-C coverage in Southeast Asia and by 27 December 1968 the Coast Guard had received authorization to proceed with the project. This led to the construction a LORAN station at Tan My, South Vietnam, that supplemented the other LORAN stations in Southeast Asia first established in 1966 under an operation code-named Tight Reign.
(Source: USCG Historian’s Office)