NORTH ATLANTIC - GROSS NAVIGATION ERROR Please find attached a copy of a letter that has been sent in respect of a North Atlantic (NAT) gross navigation error attributed to an aircraft registered in your State. You will note that the Operator has been requested to provide an explanation of the incident. This is in accordance with the NAT monitoring procedures set out in the ICAO NAT DOC 001, prepared and distributed by the ICAO European and North Atlantic Office. Should the Operator fail to reply to the request a further letter will be sent to you seeking your assistance in obtaining the information requested. Yours faithfully, Signature) NAT CMA for ICAO * To be used when aircraft/Operator is known to be RVSM/MNPS approved