The Chinhae visit extended three days into 1979 at which point the submarine set out for the Marianas. She reached Guam on 11 January and remained there through the end of the month. On 1 February, she embarked on the voyage to Subic Bay where she arrived on the 6th. Three days later, "Barb" put to sea to take part in MULTIPLEX 2-79 that lasted until the 21st. She returned to Subic Bay for the last week in February before setting out on the voyage home on the 28th. Almost three weeks later, on 17 March, "Barb" stood into San Diego and commenced seven weeks of post-deployment leave and upkeep. At the end of the first week in May, she embarked upon a normal training routine that she carried out in the southern California operating area. Similar evolutions occupied her for the rest of 1979 and into the first weeks of 1980.