Improved landing aid availability through the use of new criteria

A relatively new approach and concept that is being used to qualify the ILS (instrument landing system) glide slope for operational use is presented. It is argued that greater availability of ILS components means a higher level of safety. A proposal is also presented for consideration of a new standard which will also allow for still greater availability. This relates to lateral coverage requirements for glide slopes. It is concluded that, with new criteria, greater availability is present, improved standards are in place, and the public is better served, not only with greater safety, but also with increased reliability of air travel schedules