"Walnut" installed 34 new buoys while removing 25 older un-serviceable buoys during the six-month deployment. She also participated in search and rescue operations, towing and logistical assistance, UN sanctions enforcement boardings, and standby for oil recovery duties. "Walnut" arrived home from a six-month deployment 27 June 2003 after port calls at Singapore and Cairns, Australia. During February 2005, "Walnut" established a security zone surrounding the grounding of M/V "Cape Flattery" while damage assessments to coral reefs were being conducted. In July 2005 she conducted lightering of fuel from the grounded M/V "Casitas" at Pearl and Hermes Atoll, now a part of the Papahānaumokuākea Marine National Monument. On 9 September 2006, "Walnut" intercepted M/V "Marshalls 201", a foreign-flagged fishing vessel illegally fishing in the Howland/Baker Exclusive Economic Zone. During the summer of 2019 the "Walnut" and the USCGC "Joseph Gerczak" visited the smaller ports of American Samoa and neighboring Samoa. The Coast Guard vessels met with HMNZS "Otago", a Protector class off-shore patrol vessel from New Zealand, to prepare for actual joint missions. In late January, 2020, Walnut left Honolulu for the final time, bound for the Coast Guard Yard in Curtis Bay, in Baltimore. Here, she will receive a extensive work as part of the Coast Guard's midlife maintenance availability program. The vessel will be the 9th Juniper-class tender to receive this midlife extension. After the work is completed, Walnut will be reassigned to Pensacola, Florida, to replace her sister-cutter, Cypress (WLB 210). Juniper (WLB 201) is expected to replace the Walnut by the end of 2020.