What Use Is An F-call?

What use is an F-call? You may have noticed over the past little while that I've been talking about off-air activities more than the ones achieved whilst actually sitting behind a radio. It's not because I'm no longer interested in talking about that, it's because of late I've had little opportunity to actually be on-air. Suffice to say, I'm working on it - hi hi. Until now I've only really used my Amateur Radio for making QSO's, that is, making contact with stations and having a quick exchange of signal report, sometimes a description of our respective equipment and perhaps the local weather. Recently I had the opportunity to use it for a slightly different purpose, which gave me a hands-on feel for why we have the protocols we do. Several Amateurs were all gathered in a 50 square km area, all well within VHF range, but out of sight of each other. Within 10 minutes each Amateur on frequency knew where everyone else was and each was heading for the same location. That in itself doesn't sound that remarka