Honolulu, Hawaii (CNN) It's been 75 years since aviator Amelia Earhart and her plane vanished.
This week, researchers set out on a two-million-dollar expedition to look for wreckage of the famed pilot's plane. The International Group for Historic Aircraft Recovery believes Earhart and her navigator, Fred Noonan, landed on Nikumaroro Island in the Western Pacific.
And Tuesday, the group launched its ninth expedition to that remote island.
This robotic underwater vehicle is mounted with multi-beam sonar and cameras to collect images from the ocean's bottom.
Researchers are hoping it will locate Earhart's plane. It will help bring closure to the whole Amelia Earhart story. And if in fact there is a final chapter to Earhart's life, a chapter that involved being a castaway struggling to survive on an uninhabited, waterless atoll where she succeeded for a time before eventually dying, that needs to be known. Earhart was trying to fly around the world when she vanished in 1937.