▁ref uel ing . ▁ ▁Ph ase ▁ 2 ▁Ph ase ▁ 2 ▁of ▁the ▁R R M ▁mission ▁began ▁in ▁August ▁ 2 0 1 3 ▁with ▁the ▁launch ▁of ▁the ▁phase ▁ 2 ▁R R M ▁hardware ▁to ▁the ▁I SS ▁ab o ard ▁the ▁Japanese ▁H - II ▁Transfer ▁Ve h icle ▁ 4 ▁( HT V - 4 ) ▁for ▁test ▁operations ▁expected ▁to ▁be ▁carried ▁out ▁in ▁ 2 0 1 4 . ▁ ▁The ▁Ph ase ▁ 2 ▁hardware ▁complement ▁consists ▁of : ▁Two ▁additional ▁R R M ▁task ▁bo ards ▁The ▁R R M ▁On - or bit ▁Transfer ▁C age ▁The ▁Visual ▁In spe ction ▁P ose able ▁In verte br ate ▁Rob ot ▁( VI PI R ) — a ▁" b ores cope ▁ins pection ▁tool ▁that ▁provides ▁a ▁set ▁of ▁eyes ▁for ▁internal ▁satellite ▁repair ▁jobs ." ▁It ▁was ▁launched ▁on ▁A TV - 5 ▁and ▁arrived ▁at ▁the ▁station ▁on ▁August ▁ 2 0 1 4 . ▁ ▁In ▁February ▁ 2 0 1 4 ▁the ▁ground - based ▁' Remote ▁Rob otic ▁Ox id izer ▁Transfer ▁Test ' ▁( R RO xi TT ) ▁transferred ▁nit ro gen ▁t etro x ide ▁( N TO ) ▁via ▁a ▁standard ▁satellite - f uel ing ▁val ve ▁at ▁the ▁satellite ▁fu elling ▁facility , ▁Kennedy ▁Space ▁Center ▁( K SC ), ▁using ▁a ▁robot ▁controlled ▁rem ot ely ▁from ▁the ▁God d ard ▁Space ▁Fl ight ▁Centre , ▁ ▁away ▁in