On 14 July, the warship completed her final tour of duty off the coast of Vietnam. She returned to Subic Bay for the period 16 to 19 July and then got underway for the voyage home. During the voyage, she completed a circumnavigation of the world and visited such diverse places as Singapore, Lourenco Marques (now Maputo) in Mozambique, the Cape Verde Islands, Lisbon in Portugal, and Copenhagen in Denmark. The warship arrived back in Norfolk on 12 September and remained in port until mid-November. On the 15th, "Biddle" got underway for missile exercises in the West Indies. She returned to Norfolk on 25 November and remained there through the end of the year.