Each officer rank in the navy of aNATO country may be compared with the ranks used by any military service in other NATO countries, under astandardized NATO rank scale. This is useful, for instance, in establishing seniority amongst officers serving alongside each other within multinational command structures.

The grades, prefixedOF- (commissioned officers) andWO- (warrant officers) were established in the documentSTANAG 2116, formally titledNATO Codes for Grades of Military Personnel.

In many navies, two separate ranks fall within the OF-1 grade. These particular ranks, known by various names in different navies, are commonly given the less formal grades of "OF-1a" (more senior) and "OF-1b" (less senior).

Warrant officers rank below officers and above enlisted servicemen. In the United States, Chief Warrant Officers are commissioned officers.

WO are used for United States warrant officers only.^[34] Countries not listed use only regular officer ranks, do not havewarrant officers, or warrant officers are considered OR (Other/Enlisted Rank).

• NATO
• Ranks and insignia of NATO
• Ranks and insignia of NATO armies enlisted
• Ranks and insignia of NATO armies officers
• Ranks and insignia of NATO air forces enlisted
• Ranks and insignia of NATO air forces officers
• Ranks and insignia of NATO navies enlisted

• Davis, Brian L. (1988).NATO Forces: An Illustrated Reference to Their Organization and Insignia. Blandford Press.ISBN 0-7137-1737-8. Retrieved11 April 2022.