NORTH ATLANTIC - GROSS NAVIGATION ERROR Please find attached a copy of the notification of a North Atlantic gross navigation error attributed to an aircraft registered in your State. As this aircraft was operating outside MNPS Airspace (ICAO Doc - NAT/RAC, Chapter 2 refers) and the observed deviation was less than 50 NM no further action is called for by the NAT monitoring procedures set out in the ICAO NAT DOC 001, prepared by the ICAO European and North Atlantic Office. However, should you decide to investigate the circumstances of the incident, it would be appreciated if you would advise this Office of your findings. This information would be of interest in fulfilling our responsibilities as the monitoring agency of navigation errors in the North Atlantic Region. Yours faithfully, Signature) NAT CMA for ICAO