Kosmos 811Rocket launchby RussiaLaunch time31 Mar 197612:50 UTCsuccessFinal flight of the Soyuz-M.MissionRocketPayloadsRocket SoyuzMlaunched from Plesetsk Cosmodrome, Pad 41/1RussiaPayloadsNamePurposeMassCommentKosmos 811 (Zenit-4MT)---