an Entity references as follows:
The United States Lightship WLV-613 was a lightvessel commissioned in 1952 that became the last lightship to mark the Ambrose Channel. She was replaced by a Texas Tower lightstation on 24 August 1967. The WLV-613 was reassigned as a relief ship on the Massachusetts coastline from 1967–79. After being assigned in 1979 to Nantucket Shoals the lightship alternated with her sister ship, the Lightship WLV-612, relieving each other approximately every 21 days as the Nantucket lightship. The WLV-613 was also the last lightship to mark the Nantucket channel on 20 December 1983. She was decommissioned and retired in 1983.