A tamper-resistant apparatus located on board of an aircraft for avoiding a restricted air space (RAS) comprising: (a) a tamper-resistant restricted air space (TAP-RAS) database configured to include a set of coordinates that determines the RAS; and (b) a navigational processor configured to navigate...http://www.google.ca/patents/US6675095?utm_source=gb-gplus-sharePatent US6675095 - On-board apparatus for avoiding restricted air space in non-overriding mode
