170810-N-VO150-268 MAYPORT Fla.(Aug. 10, 2017) An USMC Rough Terrain Cargo Handler (RTCH) offloads CONEX boxes from an Improved Navy Lighterage System (INLS) causeway ferry during Maritime Prepositioning Force Exercise 2017 (MPFEX17). MPFEX17 is a Naval Beach Group Two and 2nd Marine Expeditionary Brigade exercise that trains mission critical in-stream skills in support of the Maritime Prepositioning Force concept of operations for Bold Alligator 2017. (U.S. Navy photo by Mass Communication Specialist 3rd Class Kenneth Gardner/Released)