Archaeologists plumb depths of ancient spring

Watching Casey Coy and Rick Gomez prepare to dive into Little Salt Spring is like observing a pilot getting ready for takeoff.

Step by step, the two divers painstakingly review their equipment, instruments and procedures before taking the plunge into the prehistoric underwater site.

They say such meticulousness is imperative: When you're 242 feet underwater, there's no time for mistakes or miscommunication.