It's shorthand for above sea level. A term generally used to define how the top on Earth is to a certain position.
00:46, 15 January 2013
A pejorative name for contrails - the lines left in the sky ...
The 777-300ER (extended range) is a derivative of the ...
The Berlin Brandenburg Airport is an international airport ...
Rear edge of aerofoil or streamlined strut.
Turkish Airlines is the national flag carrier airline of ...
Skin is a sheet of material that covers a fuselage which is ...
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