A personnel of Indonesia's National Search and Rescue looks over horizon during a search in the Andaman sea area around northern tip of Indonesia's Sumatra island for the missing Malaysian Airlines flight MH370 on March 17, 2014.  - 

There are affordable technologies currently on the market that would have rendered the search for MH370 much quicker.  Corporate jet owners use them.  Even Air France Flight 447 subscribed to tracking services.  In the case of MH370, a back up battery system could have maintained the tracking systems available.