What Use Is An F-call?

What use is an F-call? Recently I had the opportunity to participate in a contest that was specifically set-up for QRP. That is, 5 Watts or less. There was an hour for digital modes, including Morse, but I don't yet speak that, so I sat tight for the second hour, for phone. This particular contest was a single band only contest, 80m. When I planned for the contest, I set my watch wrong by an hour, so I almost didn't make it, but fortunately my XYL queried my delayed departure and I was out the door in the nick of time. I headed out to the beach, only to be confronted with S8 noise from the local housing estate, so I retreated rapidly back into the bush and found myself a lovely little nook where I could park the car without causing any disruption and start twiddling the dial. I immediately learned that my vertical was very, very narrow in bandwidth, that is, there was a limited range of frequencies I could use which curtailed the activities somewhat. Undeterred I hunted up and down the workable range, h