For 20 hours, a cruise passenger was alone in the Ionian Sea, miles from land. Then, in the darkness, rescuers spotted a flashing light. What followed was captured on video. The 44-year-old woman, an El Salvadoran national, went overboard from Royal Caribbean’s Odyssey of the Seas on Friday, October 9, while the ship was approximately 72 nautical miles southwest of Zakynthos, Greece. According to the Hellenic Coast Guard , authorities immediately activated an emergency response involving a rescue boat, a patrol vessel, passing ships, and a Greek Air Force Super Puma helicopter. See the footage of the rescue here. But as daylight faded, there was still no sign of the missing passenger. Then came an extraordinary discovery. Early Saturday morning, crew aboard the cargo ship MSC Rossella III spotted the woman, conscious and floating inside a circular life preserver. According to the Coast Guard’s official statement, searchers first detected the flashing light attached to the life ring.…