In 2362, after receiving a distress call from Rugal IV, the Merrimack prevented three K't'inga class battle cruisers from attacking the Federation planet. (Decipher RPG module: Starships) In 2366, the Merrimack was assigned to personnel transport duties; it ferried Ambassador Sarek and his entourage back to Vulcan after the successful conclusion of a treaty on Legara IV. (TNG episode: "Sarek") In 2367, the Merrimack was assigned to the Vulcan Science Academy for special assignment. (TNG episode: "Brothers")