UgCS uses mission commands to control gimbal.
Do not forget to select Action on lost of RC = Continue in route parameters:
Very important that in such case your route should have last waypoint close to the desired landing point.
I made this video from cruise ship near Greenland in past year.
Magnetic interference and radars are real problem. I saw how (not mine) Phantom had disarmed and dropped to the water when pilot tried to circle around bridge.
For this flight ship was stopped and radars were temporarily...