180726-N-VO150-852 VIRGINIA BEACH, Va. A member of the Roll On/ Roll Off Discharge Facility (RRDF) team guides a U.S. Army Oshkosh Heavy Expanded Mobility Tactical Tuck (HEMTT) to an awaiting Improved Navy Lighterage System (INLS) causeway ferry during the Trident Sun 18 exercise. Trident Sun 18 is a maritime prepositioning force (MPF) operation intended to provide training to reserve component personnel with regards to the in stream offload of military vehicles and equipment. (U.S. Navy photo by Mass Communication Specialist 2nd Class Kenneth Gardner/Released)