Yes we'll have several sensor systems onboard that augments the captains visual perception, including radar, AIS, and we're looking into computer vision systems as well.

We've been testing these sensor suites in helicopters today. Flying <50 ft off the water at speeds in excess of 100 mph, simulating the seaglider operating conditions. We have plenty of time to detect and avoid traffic even in crowded waterways at speed.

My sailboat uses radar, I can see things from a good distance away. Let's say 30NM. Surely the plane will do better. But let's say it's going 180mph, or ~160kts. That's 11min from first radar contact to collision. With all that forewarning, avoiding a yacht isn't a big deal. If they can't avoid it, they can stop with 11min warning.

Let's say visual only. There will be restrictions on visibility for visual flight rules. So say that they can only fly with more than 10NM of visibility. That's still 3m45s to take action. Surely enough.