Even in 1988 I was using these as an aviational weather forecaster for the USAF. It was used to communicate weather watches/warnings to the tower, Base Ops, and others, and they used it for base wide announcements. It was strange to watch someone's writing style being broadcast in real-time and you could, obviously, even see differences in styles and handwriting. I thought it was funny to have such a system in place when we also had "hotline" phones which rung to all those same places as well as teletype machines, and even a PC or two, since it was sometimes hard to read because there was a lot of noise in the legibility as well as an importance in that person's penmanship.