Slyne Head Lighthouse, Co. GalwayFour miles off the Connemara coast, sitting barely above the waterline. That's where Slyne Head is, and getting there in 2014 meant persuading a fishing charter operator to take me and a large drone out into open Atlantic. He was so helpful he built a plywood landing deck on the stern of his boat before I even arrived. The sea had other ideas. The boat was pitching badly, and on one landing attempt I nearly lost the drone entirely. I brought it down