In this Wednesday, March 19, 2014, photo released by the Australia Defense Department, Royal Australian Air Force airborne electronics analyst Flight Sgt. Tom Stewart, on board an AP-3C Orion, watches a radar screen over the Southern Indian Ocean during a search operation for missing Malaysia Airlines flight MH370.

Australia Defense Department, Hamish Paterson / AP

In this Wednesday, March 19, 2014, photo released by the Australia Defense Department, Royal Australian Air Force airborne electronics analyst Flight Sgt. Tom Stewart, on board an AP-3C Orion, watches a radar screen over the Southern Indian Ocean during a search operation for missing Malaysia Airlines flight MH370.