Airplanetire From United States of America, joined May 2001, 1809 posts, RR: 2 Posted (11 years 12 months 1 day 13 hours ago) and read 17648 times:
What is the difference in a Category 1 and a Category 2 airport? I was looking at this thread where there was some talking about how EZE is now a category 2: http://www.airliners.net/discussions/general_aviation/read.main/973589/
What other categories are there? What restrictions does category 2 impose? It seems that it doesn't allow addition of services to the US, but anything else?
Flyf15 From , joined Dec 1969, posts, RR:
Reply 1, posted (11 years 12 months 1 day 13 hours ago) and read 17645 times:
What is discussed in that thread is a category imposed on an airline, not an airport. In reference to airports, the "Category" would most likely be in reference to the types of ILS approaches available at that airport, being I through IIIc.
Backfire From Germany, joined Oct 2006, 0 posts, RR: 0
Reply 4, posted (11 years 12 months 1 day 2 hours ago) and read 17578 times:
You're confusing two different things here:
FAA International Aviation Safety Assessment scheme (IASA)
IASA is the FAA's international monitoring programme which it uses to measure whether any particular country complies with ICAO standards.
If a country complies with ICAO, it is classified Category 1. If not, it's Category 2.
Countries classified as Category 2 are restricted in their operations to the USA. For example, airlines in Category 2 countries cannot expand US services with their own aircraft -- they must wet-lease them from other operators (from Category 1 countries).
Instrument Landing System (ILS) categories
This is completely unrelated to the IASA scheme. An ILS allows aircraft to land in low-visibility conditions. The higher the category of ILS, the more accurate the guidance, and the closer the aircraft can be to touchdown before a go/no-go decision has to be made by the crew regarding the landing. In other words, the worse the visibility, the higher the category of ILS needed to make a safe approach.
Your basic ILS is Category I. For the worst weather, you're looking at needing Category III and above (IIIa, IIIb and so on). These high-category ILSs allow zero-visibility landings and are essential for airports such as London Heathrow where the hub is too busy to allow British weather to mess things up.