FraserConcordeFan
To show you what
EXWOK was referring to when he posted
...and then a numerical entry to access the relevant part of the route (or Flight Plan Segment), which would be numbered between 01 and 87. The comms log would list the appropriate FPS number... this is a photo of a Concorde Comms Log from a JFK-LHR sector in 2003
Best Regards