Once that area has been searched without success, where do you go next?
A lot of effort will be expended on reviewing all the data and assumptions that pointed to the current search area. The aim will be to see if there was some detail that was missed; an error made in an assumption or an assumption that was overly optimistic; or anything that might suggest an amendment to the existing search area, or maybe a new one.
Oceanographers forecast that any floating wreckage originating from the existing search area would come ashore along the African coast, near La Reunion Island, about the time it did. This suggests, if the wreckage is not actually in the search area, it might be tantalisingly close.
It could be an option to just continue with a race track search pattern around the boundary of the existing search area, ever increasing the search area until the wreckage is found. Watch: Discovery of a new possible piece of MH370
One possibility is that the aircraft is actually in the search area, and for some reason related to the search equipment fidelity, assumptions in analysis algorithms or underwater terrain anomalies, the wreckage has been missed. We could search for years and years and not find it.
And if we check and recheck all the data, assumptions and error tolerances and find nothing new, then when, if ever, do we decide to go back and look again in the same area?
No doubt the relatives of those lost with the aircraft would support the continuation of the search. But many others will argue that the search should be called off, especially as the cost of continuing will be hundreds of millions of dollars a year. New technologies
Some will argue the money would be better spent on development and implementation of new technology applications to prevent aircraft from just disappearing from radar. Or, on ensuring important flight data is transmitted from the aircraft so the need to find the on-board flight recorders becomes less vital.
One of the many mysteries about flight MH370 is why the aircraft's transponder was apparently turned off minutes after one of the pilots signed off from Malaysian air traffic control. Transponders let air traffic controllers know the location of an aircraft, so turning it off makes the aircraft disappear from radar.
One very interesting debate raging at the moment is whether it should be impossible for the transponders to be switched off by the pilot or anyone else on board. If that had been the case, then flight MH370 couldn't have just disappeared.
But one of the long-term flight safety tenets is that pilots should be able to isolate all electrical circuits should any failure or fault in the system cause a fire. A design change to prevent pilots switching off transponders would introduce a new risk should any fault in a transponder lead to a fire. Just theories
In the absence of any new information, there will be nothing concrete to support or debunk all the theories about what happened to flight MH370: hijacked by the pilot, or someone else, in-flight fire, decompression and other theories have all been aired in relation to flight MH370.
Unfortunately, without finding the wreckage and the recorders, that's what they'll remain: theories. There's almost no hard data supporting any of them, just assumptions, circumstantial evidence and guesstimations.
The air safety fraternity would really like to know what happened to this aircraft, just in case there is a gremlin lurking in the aviation system just waiting to bite again. Here's hoping not!
Geoffrey Dell, is an associate professor and discipline leader accident investigation and forensics at CQUniversity Australia. This article was originally published on The Conversation. Read the original article.