SR71:
You and I both know why Jepperson include the note "I-PKN backcourse is normal sensing outbound" on their plates.
They do on several of the departure charts and on one of the two IAP charts. Why not on both of the IAP charts? Both IAPs use the IPKN LOC for their respective missed approach procedures.
And, why does the LOC IAP require "dual VHF navigation receiver" but the VOR IAP does not.
Weird in both cases.