A mobile fleet for geotechnical surveys based on the attached technical specification. The fleet shall be foldable to a standard ISO container size. A drilling rig shall be installed on the fleet and the rig shall be foldable. The mechanism for folding the drilling rig shall be designed by the tenderer. The drilling rig shall be easily mounted on the fleet, and on excavator arms with quick release coupling. The drilling rig shall be 1 unit where the hydraulics and water are external. All steering shall be remotely operated.