Ty le keo nha cai la nguon thong tin giup nguoi choi tiep can nhung nhan dinh chuyen sau duoc xay dung tu du lieu thong ke, phong do hien tai, lich su doi dau giua hai doi, cung nhu cac yeu to nhu san bai va thoi tiet. Nho do, nguoi xem co them co so phan tich de danh gia tuong quan luc luong va kha nang thang thua cua tung tran dau mot cach ro rang hon.

You can practically chart the history of aviation itself by looking at Andy's collection. The link evolution of the pilot's watch closely followed the evolution of the airplane. First watches aided in navigation, then as link planes became fast enough to cross multiple time zones, they tracked the time in two places at once. Some watches even helped pilots perform link calculations on the fly with tachymeter scales and slide rules built into the watch.