Paul Tomblin wrote:

In a previous article, said:
I don't know anything about what they printed but I am looking at the current
NACO low-altitude (L6) en route chart and see "Wichita (ICT) Mid-Continent
1338 L 103"

So, that tells me that Wichita Mid-Continent is ICT or KICT.

I can't find Wichita Mid-Continent on the segment they printed, but maybe
I'm just blind. But also, and this isn't the only time I've noticed this,
I don't see identifiers on ANY of the airports on the en-routes they
print. Sure, I see them on my own en-routes. But I check on the Howie
Keefe Air Chart Atlas, and I don't see airport identifiers there either.

Did they only recently start printing identifiers on en-routes?

I have a bitmap of an old NACO L6 (from October, 2002) and it does NOT have the
identifier ICT for Mid-Contintent International. So, it seems that NACO started
including the three-letter identifier sometime in the last 15 months, or so.