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In page Lunokhod programme:

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Lunokhod's original primary mission was to be the back-up for L3 crewed Moon expeditions and for the later Zvezda lunar base.[citation needed] For mission safety, weeks before the human mission on a LK lander, an LK-R uncrewed lander from the L3 lunar expedition complex and two Lunokhod automated rovers would be sent to the Moon for a preliminary study of the surface around LK-R and LK sites, to act as radio beacons for precision landings of LK-R and LK, and for a visual evaluation of the status of the site.[1]