The purpose of North Atlantic Operations Bulletin 2017-002_Revision 05 is to promulgate the Oceanic Errors Safety Bulletin (OESB).

The OESB is intended to help air operators transiting North Atlantic oceanic airspace avoid making commonly observed operational errors. These include Gross Navigation Errors (lateral deviations of 10 NM or more in the North Atlantic), Large Height Deviations (300 feet or more) and Erosion of Longitudinal Separation.