One ABLE vehicle carries the launch and recovery equipment as well as some bridge parts. The ABLE places a launch rail over the gap and then booms the bridge across, while the bridge is assembled it slowly launches meaning that the bridge requires no pre planning or surveying. the system that is used to launch the bridge can also retrieve the bridge as well. Two Bridging Vehicles (BV) carry the remainder of the bridge set. Each BV has a large flatbed body with a HIAB crane permanently mounted behind the vehicle cab. Each BV normally carries either the left or the right side (although they are identical). They are then added during the build using the HIAB cranes. To build the bridge, the ABLE builds its launch rail across the gap and the BVs park either side of it, and, simultaneously, pass the bridge panels onto the ABLEs building platform. When the bridge is at the required length, it is lowered onto the ground and disconnected from the launch rail. Finally, centre pieces are fitted and also curbs. Long Span Equipment (LSE) The Long Span Equipment enables a bridge with a greater load capacity to be constructed. The bridge is constructed using standard BR90 components and then a link reinforcing system is added allowing about 3x the weight to be carried. 2 x extra Bridging Vehicles (BV) are required to transport the long span components. Most bridges built in Iraq and Afghanistan have included the LSE General Support Bridge 2 Span Pontoon A General Support Bridge (GSB) 2 span pontoon equipment provides the ability to span larger gaps by using the pontoon as a pier. Two DROPS (support) vehicles equipped with a derrick and hydraulic winch are used to transport the pontoons. The 4 close coupled pontoons are powered by 2 inboard engines, which enables construction and positioning with the minimum of support. Bridging for the 90's System (BR 90) The Bridging for the 90's system (BR 90) is a modular system of bridge components that can be used to form both close support bridging and general support bridging bridges. the modular design allows damaged panels to be replaced. Close Support Bridges These are carried on the TITAN Armoured Vehicle Launching Bridge (AVLB) or the Tank Bridge Transporter (TBT). The Tank Bridge Transporter This has the same cross-country performance as a tank when loaded. It can carry 1 No 10