United States Lightship WLV-613
 The United States Lightship WLV-613 (Ambrose) 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 Ambrose was reassigned as a relief ship on the Massachusetts coastline from 1967–79. After being renamed Nantucket II in 1979 she was reassigned to Nantucket Shoals.