and operations in Puget Sound, including a port visit to Esquimalt, British Columbia. In October 1985, Drum changed her home port to Bremerton, Washington, for the second time to begin her second and last overhaul – a refueling overhaul – at Puget Sound Naval Shipyard. The refueling overhaul was completed in November 1987, and Drum returned to San Diego. which again became her home port, and became a unit of her new squadron, Submarine Squadron 11. Drum spent most of 1988 in local operations and preparation for her next deployment. Nine months after completion of her refueling overhaul, Drum left San Diego for two months of independent operations, for which she was awarded her third Meritorious Unit Commendation. In mid-May 1989, Drum departed on her tenth deployment to the Western Pacific, for which Drum was awarded her second Navy Unit Commendation. The deployment included visits to Lahaina, Hawaii, Maui and Pearl Harbor in Hawaii and to Japan. Drum returned to San Diego in August 1989 and continued operations in the Southern California area for the remainder of 1989. 1990s 1990 began with repairs and alterations that were completed in March. On 1 April 1990, Drum transferred from Submarine Squadron 11 to Submarine Squadron 3. Drum participated in RIMPAC '90, which included a port call at Lahaina, Maui, in the spring of 1990. After a summer of preparations, Drum departed San Diego in September 1990 for another deployment to the Western Pacific, during which she made port calls at Guam, Japan, and Singapore. Drum was awarded her fourth Meritorious Unit Commendation for operations conducted during this deployment, and while deployed, was awarded the Battle Efficiency Award (Battle "E") for Submarine Squadron 3 for her outstanding performance during fiscal year 1990. Drum returned to San Diego in March 1991. In August 1991, Drum commenced independent operations. She returned to San Diego in late September 1991. In October 1991, she participated in San Franciscos Fleet Week 91. Drum was awarded the Battle "E" for Submarine Squadron 3, for the second consecutive year for outstanding performance in Fiscal Year 1991. In February 1992, Drum departed on another deployment to the Western Pacific. Port visits included Pearl Harbor, Japan, Guam, Singapore, and Australia, and she completed a transit of the inner passage of the Great Barrier Reef. During this deployment, she was awarded her the fifth Meritorious Unit Commendation. She returned to San Diego in