text: While on the move the lead vehicles of the patrol commanders and sergeants flew a small flag. Because the LRP was organised on divisional cavalry lines the leaders carried green flags for 'A' (HQ) Troop, black for 'B' Troop, yellow for 'C' Troop and red for 'D'. When the LRDG was organised into 11 vehicle patrols this was simplified to a green flag displaying the patrol letter in white; the later half-patrols used a plain green flag on occasion. When it became necessary to change course from an intended route, or in the event of enemy action, patrol movements were controlled by a simple semaphore flag system using blue and white signal flags, or hand signals, depending on how widely dispersed the trucks were.
  Navigation
  All trucks of the LRDG were equipped with the Bagnold sun compass and some trucks were also equipped with a P8 Tank Compass. Each patrol had a navigator who always rode in the second truck in the formation. He was equipped with a theodolite and astronomical position tables with which to plot star sightings, and maps. Watches were used and adjusted each evening using the GMT time check. One major problem faced early on by the LRDG was a lack of accurate maps for Libya in particular. Patrols had to do their own surveys and make their own maps of each route they took. In July 1941 the Survey Section was formed to carry out this task.