Ranger Station Charlie audio log is a set of two holodisks in Fallout: New Vegas.
Locations
Both tapes can be found inside Ranger station Charlie's office building after you are asked by Ranger Andy to check up on the station. Log 1 is located under the desk and log 2 can be found on top of a metal box.
Transcripts
Ranger Station Charlie audio log 1
...drove the raiders off. No casualties. In the meantime- Patrol's back. They're late. I hope they got a good excuse. What took-