▁orbit ▁circular ization ▁burn ▁and ▁the ▁final ▁lun ar ▁descent ▁burn . ▁ ▁Over ▁the ▁course ▁of ▁five ▁days , ▁the ▁Block ▁D ▁stage ▁was ▁ign ited ▁three ▁times ▁to ▁raise ▁the ▁initial ▁~ 1 9 0 ▁km ▁× ▁~ 3 0 0 ▁km ▁× ▁ 5 1 . 6 ° ▁orbit ▁to ▁a ▁final ▁ 2 5 7 7 ▁km ▁× ▁ 5 0 8 2 ▁km ▁× ▁ 5 5 . 8 7 ° ▁orbit . ▁The ▁Block ▁D ▁stage ▁was ▁fitted ▁with ▁cam eras ▁in ▁the ▁t anks ▁to ▁monitor ▁the ▁fuel ▁and ▁ox id izer ▁behaviour ▁in ▁weight less ness ▁and ▁during ▁acceleration . ▁Kos mos - 3 8 2 ▁also ▁carried ▁other ▁experiments , ▁including ▁a ▁prototype ▁environmental ▁control ▁sub system ▁named ▁" R osa " ▁for ▁producing ▁pot able ▁water ▁from ▁atmos pher ic ▁cond ens ate ▁ex h aled ▁by ▁cos mon aut s ▁on board ▁Soviet ▁man ned ▁space craft . ▁This ▁system ▁was ▁later ▁used ▁on ▁the ▁Sal y ut ▁space ▁stations ▁in ▁the ▁ 1 9 7 0 s ▁and ▁ 1 9 8 0 s . ▁ ▁The ▁following ▁man eu vers ▁were ▁performed : ▁▁ 1 9 0 ▁km ▁x ▁ 3 0 0 ▁km ▁orbit ▁to ▁ 3 0 3 ▁km ▁x ▁ 5 0 3 8 ▁km ▁orbit ▁( delta - V = 9 8 2 ▁meters / second ; ▁▁ 3 1 8 ▁km ▁x ▁ 5 0 4 0 ▁km ▁orbit ▁to ▁ 1 6 1 6