I was flying at just after 9 am today near Estepona, Spain. I thought I would take a few photos so climbed to 273m (about 900 feet). I turned 180 degrees to face up the coast and I can see a C130 plane coming towards me. It was about 400m off the coast and I was about 100m out. He looked pretty much the same height, maybe just a few feet higher. Whilst the minimum is 1000 feet for commercial planes, this looked like Spanish military, that have no limits!
We were close enough to wave! Just wish I had had my video on! The photo below was just after he went past to my right. By the time I turned round to see where he was going, it was just spec in the camera.