โค้งสุดท้าย ตะเคียน บนเขา จังหวัดเลย ขอหวย เลขเด็ด ชัด งวด 16 พ.ค. 62
Winter time and bad weather is usually a big damper for General Aviation Pilots. During those long winters its easy to forget lots of knowledge that was acquired with lots of hard work. The medium you operate in is nowhere else to be found, than, of course in the sky and it is therefore even more important to keep up with knowledge.
from: http://ezinearticles.com/?How-Do-Private-and-Student-Pilots-Keep-Up-With-Their-Knowledge-and-Study&id=1941164
