They have been doing amazing things with LIDAR. Hopefully, that technology will help in the near future.UFO collisions are a major issue for all high speed offshore boats. Recent generations of boats are way more prone to serious damage form UFOs than older boats given their higher speeds and reliance on complex appendage configurations. I believe from reports I've read that in the recent accident involving a 52 foot mono with a DSS foil the boat was only doing about 8 knots when it hit the UFO. 7 or 8 tonne boat at 8 knots and it's curtains. Compare that level of kinetic energy with an 18 tonne boat at 35 knots. Ke = 1/2 x M x V^2 and crunch the numbers, over 40 times the energy to dissipate in a collision.
Sensors are an answer but detecting an object at a turbulent air/water interface in time to avoid it will challenge sensor technology and systems for a long while. Detecting objects just under the water surface will too. Bring on the challenges, but accept that there will be plenty of serious accidents in the meanwhile.