สูตร2ตัวบน ดันมาบนล่าง 24-25ตรงเป๊ะ (เข้ามา3งวด)ไปต่อ 16 พฤษภาคม2562
When Amelia Earhart made her attempt to fly 29,000 miles around the world, available technology only allowed her to complete about 22,000 of the miles. Had GPS (Global Positioning System) been available to her, it is likely she would have been able to find and land on Howland Island in the mid-Pacific Ocean in July of 1937.
from: http://ezinearticles.com/?The-Importance-Of-GPS-For-Pilots&id=1209832
