First Day Cover: Two planes, intersecting flight paths (UNO Geneva 1978)
Two planes, intersecting flight paths (UNO Geneva 1978)
12 June (UNO Geneva ) within release I.C.A.O. goes into circulation First Day Cover Two planes, intersecting flight paths face value 0.70 Swiss frank
| First Day Cover Two planes, intersecting flight paths in catalogues | |
|---|---|
| Michel: | Mi:NT-GE FDC76 |
First Day Cover is square format.
Also in the issue I.C.A.O.:
- First Day Cover - Two planes, intersecting flight paths face value 0.70;
- First Day Cover - Two planes, intersecting flight paths face value 0.80;
First Day Cover Two planes, intersecting flight paths it reflects the thematic directions:
Aviation is the practical aspect or art of aeronautics, being the design, development, production, operation and use of aircraft, especially heavier than air aircraft. The word aviation was coined by French writer and former naval officer Gabriel La Landelle in 1863, from the verb avier (synonymous flying), itself derived from the Latin word avis ("bird") and the suffix -ation.
An aircraft (pl. aircraft) is a vehicle that is able to fly by gaining support from the air. It counters the force of gravity by using either static lift or the dynamic lift of an airfoil, or, in a few cases, direct downward thrust from its engines. Common examples of aircraft include airplanes, rotorcraft (including helicopters), airships (including blimps), gliders, paramotors, and hot air balloons.Part 1 (Definitions and Abbreviations) of Subchapter A of Chapter I of Title 14 of the U. S. Code of Federal Regulations states that aircraft "means a device that is used or intended to be used for flight in the air."
