Both designs are adjusted to fit the available space and terrain features, obstacles are built between 5 and 10 yards apart, not all obstacles are always used, and obstacles from Type A (Trained soldiers) may be used in a course at a Training Camp, for example the Assault Course used by British Army recruits at Pirbright has 10 obstacles, including a maze, 2 dry ditches and a cargo net, whilst the Assault Course at Worthy Down Camp has only 8 obstacles. The Royal Air Force uses the British Army designs, and has Assault Courses at RAF Honington, RAF Halton, and the Royal Air Force College at RAF Cranwell. HMS Collingwood, a Royal Navy, shore establishment has an Assault Course with suitable naval themed obstacles, it has water obstacles which are crossed with ropes and pulleys, as well as a wall to climb over and pipes, on a slope, to crawl up. HMS Raleigh (another RN shore establishment) also has an Assault Course.