NAVAREAs, also described as Navigational areas,[1] are the maritime geographic areas in which specific governments are responsible for broadcasting navigation warnings. Weather warnings have a similar system using METAREAs
NAVAREAs are mentioned in International Maritime Organization Assembly Resolution A.706(17) adopted 6 November 1991.
The International Hydrographic Organization publication S-53 has a document entitled "Worldwide Navigational Warnings Service - Guidance Document" which is related to NAVAREAs.[2]