[deport]

For what it’s worth:

The revised search sector — about the size of Norway — was “based on continuing analysis
of radar data between the South China Sea and the Strait of Malacca before radar contact was
lost (with MH370)”, AMSA said.

“It indicated that the aircraft was travelling faster than previously estimated, resulting
in increased fuel usage and reducing the possible distance the aircraft travelled south
into the Indian Ocean.”

http://news.yahoo.com/mh370-search-area-shifted-credible-lead-014626793.html

[Uncle Chip]

radar data between the South China Sea and the Strait of Malacca before radar contact was lost (with MH370)”, AMSA said.

Okay so because it was travelling faster during the early part of the flight -- the first 2 hours -- than first thought it would have used up more fuel on that early part of the flight and not had enough for the last 5 hours of the flight.