What Does Bravo Zulu Mean?
By Juan Mediavilla. Published May 31, 2026. Last updated May 31, 2026.
Classification: Official naval signal.
Bravo Zulu means well done in naval usage. It is also written as the two-letter signal BZ. The phrase is commonly used to recognize a person, crew, or unit for a job performed well.
Why Bravo Zulu means well done
The U.S. Naval History and Heritage Command describes Bravo Zulu as a naval signal conveyed by flaghoist or voice radio. Its meaning is well done.
That source traces the signal to the Allied Naval Signal Book, ACP-175. Signals in that book were organized by general subject. The B series covered administrative matters, and BZ was the last signal in that series.
Naval organizations still use the phrase in ordinary recognition messages. For example, a commander may send a Bravo Zulu to a crew after a successful operation, inspection, or demanding period of service.
How to say and spell Bravo Zulu
The phrase is formed from two NATO phonetic alphabet words:
B: BravoZ: Zulu
Use the ABC Nato translator to display BZ as Bravo Zulu with signal flags and Morse code.
Signal context matters
The same letters do not always mean the same thing in every communications system. The International Code of Signals, a maritime safety reference published by the National Geospatial-Intelligence Agency, assigns BZ a different meaning: a message about a magnetic bearing.
That does not conflict with the naval well done meaning. It shows why a signal must be interpreted within the codebook, service, and operational context in which it is used.
When Bravo Zulu is useful
Outside formal signaling, Bravo Zulu works as a concise congratulatory phrase. It carries naval history while remaining understandable in an email, message, or conversation when the audience knows the expression.
For other sourced terms, browse the NATO alphabet expressions glossary. You can also read about Zulu, the second code word in the phrase.