Let’s start with a brain jiggle – if the actual outside air temperature (OAT) differs from the ISA for the particular altitude or flight level that you are at, then this will affect your aircraft’s performance…
it is important to understand the requirements, with regards to distance from clouds, not just to stay in the legal limits if you are VFR, but to ensure the safety of your flight. Understanding the difference between cloud base and cloud ceiling seems a challenge, but it actually isn’t!
You are coming in for a landing, seem to be holding that perfect 3° glide slope and your speed is spot on. Then without warning, your indicated airspeed shows a significant decrease even though you are well-trimmed for straight and level – what on earth is going on, you might wonder?
Ever thought that the ground looks closer even though your altimeter is still reading the same altitude? We look at how a temperature change will affect your flight and how to correct for it.
Relative humidity, and dew point are important factors to you as a pilot, as it can help you determine what possible weather you may encounter en-route, and where the dangers lurk.
The fact is, apart from your aerodrome, it is unlikely that you will find windsocks conveniently placed on your route, nor will every area be covered by ATIS reports, so how do you determine wind direction?