AMSA says the search zone covers 600,000 square kilometres of ocean and has been plotted using data based on the last satellite relay signals sent by the plane. 澳大利亚海事处(AMSA)称,搜寻区域覆盖了60万平方公里面积的海洋,业已在用此前卫星所接收到的那架飞机信号的数据加以研判。