Yes interesting photo's...
The WIKI people confirm...
"
RFA Argus is a ship of the Royal Fleet Auxiliary operated by the MoD under the Blue Ensign. Italian-built, Argus was formerly the container ship MV Contender Bezant"
However did not suggest what the
ramp like structure [behind the superstructure and amid ships]...was used for
Looks like a hinged ramp with a lot of service pipes [in the raised or housed position], however I cannot see it pivoting or swivelling athwart ships unless it is telescopic?
Derek
EDIT.......no just ventilation pipes......