occupied 16 January to 18 January, before the submarine got underway for Fort Lauderdale, Florida, to provide services for the Naval Ordnance Laboratory Test Facility (NOLTF) there. Ten days of local operations at the NOLTF preceded the ship's providing services for during the nuclear ballistic missile submarine's sea trials off the Florida coast from 6 February to 8 February. Subsequently taking part in Operations "Springboard" and "Exotic Dancer III," Trumpetfish headed for Philadelphia, and a yard overhaul which would last through the summer and fall and into December 1970. After the long overhaul, the submarine participated in type and refresher training off the East Coast before she headed for the Caribbean in the spring. Among her activities were those which provided services for the Federal Republic of Germany's destroyer between 7 May and 14 May. The exchange of several crew members with the Bundesmarine ship during this time provided a valuable and enlightening experience. On 5 June, after participating in a fleet naval mine test, Trumpetfish commenced six weeks of pre-deployment upkeep, with sea trials from 12 July to 16 July. On 23 July, the submarine departed for South American waters and Operation "Unites XII." Joining Task Force (TF) 86, Trumpetfish arrived at Cartagena, Colombia, on 6 August, prior to transiting the Panama Canal to proceed down the Pacific coast of South America. She crossed the equator on 20 August and made port at Callao, Peru, on 30 August. The ship operated with TF 86 for two weeks after the four-day port visit at Callao, before arriving at Valparaíso, Chile, on 17 September. The submarine traversed the inland waterway and the Strait of Magellan and arrived at Punta Arenas, Chile, on 4 October. She conducted operations during "Unites XII" off the Atlantic coast of South America, with visits to March Del Plata, Argentina, and Rio de Janeiro, Brazil, before rejoining TF 86 at La Guaira, Venezuela, on 2 December. Bidding farewell to the task force four days later, the ship sailed for Charleston and arrived at her home port on 17 December 1971. Trumpetfish remained with SubRon 4, operating out of Charleston through 1972. She deployed to the Caribbean again on 25 January 1973. Later conducting torpedo tests off Newport, Rhode Island, the submarine operated with British aircraft carrier off San Juan, Puerto Rico, in May, before returning to Charleston on 30 January. Upkeep, type training, and services for Patrol