[ August 15, 2015 (revised proposal May 25 2016) — by Ed Anderson ]
Searches in the Indian Ocean have continued for Malaysian flight MH370 since its disappearance on March 8, 2014. Satellite radio communications with the plane in flight have been analyzed in detail, giving a search path tens of kilometers wide on a long arc with a radius of over 5,000 km. The arc is defined by the timing of the seventh and last INMARSAT handshake with the plane. The narrowed search area along this “7th arc” remains large, with ship soundings since mid-2014 focusing on about 1,000 km of the arc, centered some 2,000 km WSW of Perth. This area is based on the expected fuel range of the aircraft and estimates of an autopilot flight bearing based on radar, satellite, and cellphone contact signals at the time the flight went missing.