This is a list of bridging and trackway equipment used by the Royal Engineers of the British Army. For more equipment in use with the Royal Engineers, see Modern equipment of the British Army. Air Portable Ferry Bridge Air Portable Ferry Bridge GP The Air Portable Ferry Bridge GP is usually transported on 8 x DROPS NATO pallets but it can be changed to allow it to be flown forward underslung beneath a support helicopter. The system has been used on operations in Afghanistan the equipment has 5 versions. Air Portable Ferry Bridge Over Bridge An APFB (OB) can be constructed by a Royal Engineer Section. If required it can be transported on Trailers. The trailers can then be underslung underneath a helicopter or can be towed by long wheelbase land rovers or other vehicles once on the ground. Air Portable Ferry Bridge Single Storey The APBF Single Storey (SS) can be constructed by a Royal Engineer Troop. It is generally transported on NATO pallets. Air Portable Ferry Bridge Single Storey Reinforced (SSR) This version can be constructed with reinforcing link to enable a greater load to be carried. however it does increase the overall weight and the completely of the whole bridge. Air Portable Ferry Bridge Ferry The Air Portable Ferry Bridge (APFB) Ferry (FY) is a self-propelled roll-on, roll-off ferry. It has its own wheels so can be towed by vehicles like land rovers and some other vehicles like APC's. The bridge is constructed on a standard frame and then boomed onto six pontoons then it is bolted on The pontoons have two water propulsion units, which are used to steer the ferry when it is in water. The engines that are used to power the propulsion units are also used to operate the hydraulic rams, which raise and lower the two ramps. Air Portable Ferry Bridge Safety Line System All APFB systems include a safety line system designed to protect the user in the event of a fall from the bridge. It uses a static line and fall arresters attached to the demolition harness. It is designed for use during ramping, decking and positioning kerbs. Logistic Support Bridging Logistic Support Bridging (LSB) The LSB is usually constructed with the help of a crane, it provides a larger load capacity than Close Support Bridging or General Support Bridging. One standard unit contains all the components needed to build,