Definitions by FO Jim

ILS 

Instrument Landing System

It is used in aviation, typically on bad IFR days. I HATE using the ILS because there's no skill...

Some operators require a landing with ILS, and some European airports do too.

I prefer doing NPAs or RNAV approaches...

The ILS catches usually around the Mode C Veil - 30 to 50 NM from the airport.

Usually only Class B Airports have ILS systems, but some Class C airports have Cat I systems...

Me: Hopkins Tower, this is Delta 4558 inbound, full stop, ILS landing...uhh Delta 4558

Them: Roger, standby Delta 4558

Me: Roger, Standby
(5 mins later)

Them: Delta 4558, cleared to land 24R, you are number two. Winds 250 at 10, altimeter 3021.

ILS by FO Jim October 22, 2012