Expert: Adrian Beney - 9/23/2009

Question
What is the significance of a large ILS feather on an approach chart?
What is an area chart and how do you know there is one for a particular area?
Is the use of an area chart required when operating in an area contained in one?
Where are the airport and approach control frequencies found on the chart?
How often are charts and approach plates revised?

Answer
THe ILS Feather is the path of an ILS approach outside controlled airspace; pilots are advised to keep clear of it unless making an approach.

We don't use area charts in the UK as such, but you'll find there are charts of almost everywhere; the more complex the airspace or the denser the traffic the larger the scale available. So for the UK there are 3 1:500,000 charts and about 8 1:250,000 charts. Also there are 1:1 million en-route charts.

In the UK you are required to have appropriate navigation equipment and materials.

Depends on the chart

In the UK, charts about every year, approach plates as needed.