Another AIRAC (Aeronautical Information Regulation And Control) period starting on May 31st, 2012. Let’s give some background information about the AIRAC Cycle. The AIRAC cycle was adopted in 1964 and further improved over the years. Key are the worldwide effective dates with 28 days intervals (e.g. 4 August 2005, 1 September 2005, 29 September 2005,...

