There are two modes in most drones or quadcopters. One is a GPS lock mode, which, if you take your hands off the controller, will lock and keep the drone exactly in that spot. But that’s difficult when you’re trying to follow a moving sailboat. So then you go to the attitude mode, where it holds a level attitude but if you let go of the controls, it will drift downwind like a balloon. So downwind, I use the attitude mode because I can be hands off and just slightly correcting the drift of the drone downwind. Generally, boats are as fast as the wind speed, so I almost have to do no work. It’s actually easier downwind. Upwind, I use the GPS mode, so if I go near a mast or have a problem, I can go to the stick, give it power and go above, and I know it’s going to hold its position. We flew the drone here last year and there were gusts up to 30 knots one day—no problem. The stability system in the drone, its GPS hold, was enough to be absolutely stable. There’s also a sonic altimeter, which will tell how high the drone is off the water. It knows if there’s an object to the side, and it will automatically stay away from it. It’s not perfect. If you fly it 30 miles an hour into the side of a mainsail, it’s going to hit, but if something slowly comes at it, it will recognize it and stay away.