"Jay Honeck" writes:

I would be surprised if Oakland Center's host computer has 7S3 in its
memory,

Given that my office PC has 7S3 stored in it (thanks to multiple flight
planning programs) it's hard to imagine anything dumber, in this day and
age.

Hey...aviation GPSs have all airports and navaids in North America
stored in a handheld unit! It's amazing the antique equipment used by
the FAA.