General and Technical Data Model number:Â M135Code name:Â FrogmanUnit type:Â submersible construction laborManufacturer:Â Hishikawajima Heavy IndustriesOperator:Â civiliansRollout:Â October 1998 ADAccommodation:Â pilot only, in standard cockpit in torsoDimensions:Â overall height 7.12 meters; ...