Kimmo Huosionmaa Mysterious, possible STEALTH-yachts are seen at San Francisco-bay, and maybe they are some kind of experimental vehicles, what mission is to operate with special forces and intelligence service, for taking pictures of enemy harbors and recording the sounds of propellers and machines, and also they might collect information of opposite force's radar and communication signals. Those yachts are probably used also for anti-smuggling operations for customs and DEA, but there is no sign for the operators. Modern STEALTH-ships are of course highly automatized systems, what can operate independently. They can be dropped to the sea from other warships, and they can slip near the enemy battle-units and open the fire by using sophisticated weapon systems. Also, those vessels can operate with naval special forces. If we think the weapons and automatization, we might think, that some of those small size vehicles are actually sea-running versions of the Predator-drones, an