 The plans for the net defense of the Puget Sound area having been worked out in advance, "Boxwood" joined and in installing the Rich Pass antisubmarine net line in Puget Sound, commencing the work soon after 7 December and bringing it to completion on 27 January 1942.Over the ensuing weeks, "Boxwood" remained on station in the Rich Pass area, maintaining the net line and occasionally conducting local patrol work.On 16 February, "Boxwood" sailed for Indian Island, Washington, and was soon busily engaged in work at the Net Depot there, installing an antisubmarine net line at Port Townsend, a combination antisubmarine and anti-torpedo net line at Marrowstone Spit, and a fine mesh net line across the Portage Canal.