Some patrolled on Horseback with Mounted beach patrols. Malaysian police patrol boats also patrolled nearby waters. Until VE-day, the 69th patrolled and policed its area. Supply convoys sailed to Soviet ports that were patrolled by Nazi U-boats. Police closed all roads onto the moor, which was patrolled by 200 officerssome armed. Road rules apply and beaches are patrolled by local rangers. Military personnel patrolled the beach on horseback. The beach is not patrolled by lifesavers. Egyptian Army units patrolled the adjacent canal roads. The tunnel is patrolled by Highways England Traffic Officers. They also patrolled the shoreline for smugglers. By 1898, 34 officers patrolled the city on horseback. The Blackhorse Regiment patrolled the U.S.-Mexican border from 1919 through 1942. Minimum security prisoners live in less-secure dormitories, which are regularly patrolled by correctional officers. Tumbledown is now regularly patrolled by rangers.