1. Operational update措施更新
In the northern corridor, we have divided the search area into seven quadrants. Each of the seven quadrants is 400 nautical miles by 400 nautical miles – or 160,000 square nautical miles in total. We have also divided up the southern corridor into seven quadrants. Just like in the north, each quadrant covers an area of 160,000 square nautical miles. The entire search area is now 2.24 million square nautical miles.