Not exactly a reply, but during the Nimrod MR1 days we used to fill the Fishery protection role using callsign Watchdog. The role also required us to call any oil rigs we passed during our waaderings around the North Sea. A titter was always raised when we called the Rough field -
"Rough, Rough this is Watchdog"
Childish I know, but it was a long time ago!