Thank goodness for GPSby Phil Atkinin About Gliding, Members Flightson Posted on 3 December 20243 December 2024 Before the days of GPS and loggers, when flying cross-country we had to take photographs of turning points to prove that we’d rounded them. The rules were quite strict about where you had to take the photo from. I recently did a flight to Belvoir Castle (near Grantham and pronounced “Beaver”) and, being a sunny day, I decided to take some photos of the castle. Like I said: thank goodness for GPS.