HE looks physically old, stout and wrinkled. However, at the age of 70, he remains very agile. He is aboard a vessel furnished with sophisticated equipment: a sea scanner capable of detecting objects to a depth of 400 meters, and sonar for depth measurement of up to 50 meters.

With two oxygen tanks on his back, he dives into the waters. When he emerges again, he has a broad smile on his face. He flaunts his find: a Chinese dish. He dives several