Some passengers on long-haul flights have been left puzzled by an unsettling discovery marked on their inflight maps.
The flight maps appear to show the locations of shipwrecks and their year of sinking.
"Titanic; 1912" and "Thresher; 1963" were among some of the more obvious wrecks showing up on the flight information systems of Swiss Airlines, Emirates and American Airlines.
Taking to Twitter the travellers were not alone in thinking it was an odd inclusion on the flight maps, and one that did not fill them with confidence.