Paul G. Allen, who co-founded the giant Microsoft Corporation with the more widely-known Bill Gates, sailed into Israel Friday on his 300-foot yacht on an unknown mission. Journalists were banned from the area of the Ashdod port, where his yacht docked. None of Israel’s marinas are able to handle the huge boat, and Allen took a helicopter from the port to Ben Gurion Airport.

All that is known is that he visited a marine archaeological site. Microsoft has increased its operations in Israel, where it runs a research and development center.