The M60 AVLB is an armored vehicle based on the M60 Patton main battle tank's hull and used for the launching and retrieval of a 60-foot (18 m) scissors-type bridge. The AVLB consists of three major sections: the launcher, the vehicle hull, and the bridge. The M60 AVLB or Armored Vehicle Launched Bridge was introduced in 1963. This combat engineer vehicle was developed by the US Army Engineer Research & Development Laboratories under contract with General Dynamics to replace the previous M48 AVLB. It was designed to launch bridge for tanks and other wheeled combat vehicles across trenches and water obstacles in combat conditions. A total of 400 armored bridge launchers and bridges were built. 125 M60 AVLBs of all variants were constructed.