Republic of Singapore Army's Standard Obstacle Course (SOC) dates from 1967, in 2010, the SOC was redesigned to provide realistic obstacles which may be found in either the jungle or urban battlefield. 6 old obstacles were removed (including the Monkey Bars which were known on the SOC as the Swing Trainer) and 7 new obstacles added. The new SOC has 12 obstacles: Low wall, stepping stones, rubble, tunnels, dodging panels, low rope climb, ditch, corridor, balance bridge, window, apex ladder, and terrace.