[問題] 兩個問題
1、昨天從北京回台北時，發現在機上打開google map，藍色的定位點會隨著飛機移動，
以前在東京飛札幌時也有遇到過，但我的iPhone確實顯示「沒有服務」，這是為什麼？（
有點不知道這題應不應該po去iPhone板）
2、飛機在進場時，是靠什麼技術能夠在空中就確實對準跑道中線的？
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