The investigation into the AirAsia crash has turned to the sea floor, with more sonar equipment and metal detectors deployed today to scour the seabed for wreckage, including the plane’s black boxes.

More ships loaded with sensitive equipment have arrived to search for the fuselage of AirAsia Flight 8501 and more than 150 people still missing, five days after the aircraft crashed into the sea.

Nearly a year after the tsunami separated them from their daughter, a German-Thai couple say they are certain their missing five-year-old child will be back with them as a special Christmas present.