On completion of overhaul on 28 January 1942, "Sicard" left Pearl Harbor for an antisubmarine patrol station southwest of Oahu, where she escorted ships within her area and searched for hostile submarines. Between 1 and 9 April, she helped lay a large defensive minefield at the French Frigate Shoals, some 500 miles northwest of Oahu; and, between 10 and 18 April, she set up a Marine radio and surveillance station at Eastern Island in the Midway group. On 19 June, "Sicard" sailed from Pearl Harbor with other light minelayers, picked up mines at Seattle, Washington; and, in July, laid a defensive minefield off Kodiak, Alaska. On her return to Hawaii on 27 July, she resumed her local patrol assignment. She sailed on 16 September for the Aleutian Islands to lay another minefield and conduct more patrols and then proceeded on 22 November to San Francisco for overhaul.