The vehicle is limited to ground effect due to regulatory limitations and because it provides efficiency benefits but not physically. There are different classifications of WIGs, class B allows for hops over things so this could be a future option. In reality a sailboat is a pretty easy thing to avoid. Since its basically flat on the water, there aren't many large obstructions to line of sight and something like a sailboat is moving much slower relative to seagliders. It will be a simple “see and avoid” maneuver with ample time to react!