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UNIT LEVEL MAINTENANCE
ROLL-ON/ROLL-OFF DISCHARGE FACILITY
DESCRIPTION AND DATA
EQUIPMENT CHARACTERISTICS, CAPABILITIES AND FEATURES
The Roll-On/Roll-Off Discharge Facility (RRDF) is a floating discharge platform for ocean-going roll-on/roll-off
sealift vessels. It provides the capability to move rolling cargo from the sealift vessel to lighters for movement ashore.
The RRDF platform consists of an assembly of 153 non-powered floating modules. These modules are assembled
into five sub assemblies, which are then connected together using the Navy flexor and shear connector system which
forms a hinge joint between them. The five subassemblies are 80 ft long and of differing widths. The width depends
on the sub assemblys location in the platform and on whether the RRDF platform will be used at the side ramp or the
stern ramp of the sealift vessel. The overall dimensions of the RRDF platform are 400 ft long by 120 ft wide.
The RRDF is maneuvered into place, either alongside or astern of the sealift vessel, by warping tugs. It is secured to
the sealift vessel in position for the stern or the side ramp to land on the platform.
Up to two Landing Ships Vehicle (LSV) or two Landing Craft Utility (LCU) watercraft lighters can be loaded at a
time from an RRDF platform. In addition, the platform is capable of supporting two M-1 Abrams tanks and one
sealift vessels cargo ramp foot on the platform surface. The structure of the RRDF will withstand the cargo loading
through Sea State 2 conditions.
The RRDF consists of up to 17 intermediate modular sections. Intermediate sections consist of three center modules
and six rake end modules (two center rake modules, two right-hand rake modules and two left-hand rake modules).
Other major components of the RRDF are the personnel shelter, diesel generator set, trailer-mounted light towers,
lifeline subsystem, communications equipment, Rigid Hull Inflatable Boat (RHIB) and the Emergency Anchoring