The first thing that Commander Daguerre requests is for one to help her use the USSA console at the Vault Dweller's C.A.M.P.. She needs this to locate her crewmates, and will additionally need a scanner upgrade found at the National Radio Astronomy Research Center.
Once collected, head back to the C.A.M.P. to return the scanner upgrade to Sofia.
The original location to find the target item was the ATLAS Observatory, but with the impending return of the Brotherhood of Steel with the Observatory serving as their new headquarters, the location was changed to the Research Center following patch 126.96.36.199.
Behind the scenes
The quest's name is a reference to the first words spoken on the Moon, said by Neil Armstrong: "That's one small step for [a] man, one giant leap for mankind." However, in the Fallout world, Captains Michael Hagen, Richard Wade and Mark Garris were the first humans to walk on the Moon.
This article is too short to provide more than rudimentary information about the subject. You can help Nukapedia by expanding it.