six tripwires, then turn around, 9: step over six tripwires, 10: climb over the high wall,11: weave in and out of the 4 support post for the balance beam, 12: swing under the horizontal ladder, 13: cross two platforms to the 1.8m high platform and jump down, 14: climb through a 0.5m wide and 0.4m high hole in the low wall, 15: climb into the 2m wide 2m deep trench and out the other side, 16: cross all 5 stepping stones, then turn around and sprint the final 100m to the start/finish. The standard for under 24 year old's is 2 minutes and 35 seconds, with 2 minutes 20 seconds being good and 2 minutes 5 seconds being excellent. The 400m obstacle course is considered by Chinese soldiers to be harder than a 5km run, or a 5km speed march with 10kg. Artillery NCOs Zhang Heng and Li Xiaohoi have both achieved a time of 1 minute 23 seconds. Whilst the primary role of a military assault course is to improve fitness, they are also used for the assessment of personnel to see if they are suitable for a specific role. For example in the British Military potential paratroopers have to complete the British Army’s Parachute Regiment’s Trainasium, as one of the test, to be allowed to progress to Parachute Training, and the Royal Marine’s Bottom Field Assault Course has to be completed as one of the test for the award of the Commando Green Beret. Both of these assault courses have obstacles which provide a physical and psychological challenge to those completing them, the Trainasium has a lot of high obstacles and Bottom Field include a lot of obstacles with water. The German Army's Einzelkampferlehrgang (Individual Battle Course), a combat survival course, uses a timed assault course as one of its entry test. For the Basic Einzelkampferlehrgang Course it must be completed in 2 min 15 sec, and for the Advanced Course in 1 min 50 sec. Trim trail The term "trim trail" has also been applied to a series of wooden exercise stations, scattered in parkland or other locations beside a jogging or walking trail, which can be used to develop balance, strength and coordination. They are suitable for both adults and children, and the individual stations have been scientifically designed to provide a range of exercises. A key difference between a Trim Trail and an Assault Course