Hello Where can i found ILS , MLS and GLS vertical and horizontal ( lateral) accuracy and precision? How can i calculate them ( i mean accuracy) ? where can i found minimum ICAO or EUROCONTROL accuracy requirements for these systems?Thanks!!

Some information is in this article and the linked articles and references in the last article section. Newer systems on the way are discussed. Some avionics design information is in there. The links should take you to other avionics information.http://en.wikipedia.org/wiki/Instrument_Landing_SystemAlso look at the links in this article:http://en.wikipedia.org/wiki/RVSMSome operational information is here:www.faa.gov/library/manuals/aviation/media/FAA-H-8083-6.pdf which you should download first.I am more familiar with the FAA site:http://www.faa.govwhich produced a number of publications relating to avionics and certification when searching on 'avionics'For instrument training there are two manuals of interest. One is GA oriented and the other is applicable to GA and commercial operations. They are:# Instrument Flying Handbook# Instrument Procedures Handbookfrom this link:http://www.faa.gov/library/manuals/aviation/

thanx for information. but i didnt found in manual how to calculate accuracy? formulas? example - i know that for CAT 1 ILS must have lateral accuracy 16 m and vertical accuracy 4 meters. Where are figure that shows accuracy for all categories?

I think some of those facts were presented in your post on one of the PMDG forums.For the US it might be in the rules section of the Aviation Information Manual under one of the various rule sections. (That was on the manual index I posted.) As far as FS sims goes you can assume using the proper certified nav gear and aircraft you do not need to concern yourself about compensating for nav instrument tolerance as those gauges have been designed to meet the specs within the sim.An Internet search revealed mostly testing verification procedures but not the actual instrument tolerance.I searched under 'avionics deviation tolerance'.I would be more concerned with the avionics/instrument requirements for the various CAT procedures, NATS/PACS enroute flying, RVSM instrument requirements, etc.If you can contact someone in avionics maintenance they might be able to provide you with a reference if you feel you need to know the deviation specifications for the instruments themselves. Some documents I found were several hundred dollars of published procedures and specifications. One source was AIRINC publications.