Surveillance of major routes, patrols, and raids on suspected insurgents were stepped up. These aircraft were generally for long range reconnaissance patrols. Other measures included CCTV cameras and increased police patrols. Magee took part in three more convoy patrols. He ordered the use of aircraft in fighting forest fires and border patrols. Sheridan posted guards at the roads entering the town for protection from Confederate patrols. Missions included attacks on all types of ground targets, air superiority, and antisubmarine patrols. The Royal Newfoundland Constabulary patrols urban areas of the province. There he ruled and lived under heavy protection provided by guards and patrols. The airfield was used by the Third Air Force for antisubmarine patrols and training. However aerial patrols have limited effectiveness in reducing shark attacks. The U.S. Coast Guard patrols in national waters. Of these, only two conducted combat patrols and neither sank any Allied ships. The Sheriff patrols Old Town while having different misadventures. The helicopter division patrols about a area.