Sub-Area means a sub-division of a METAREA in which a number of countries have established a coordinated system for the promulgation of marine meteorological information. The delimitation of such areas is not related to and should not prejudice the delimitation of any boundaries between States.

Source: IMO resolution A.1051(27), IMO/WMO Worldwide Met-Ocean Information and Warning Service ‒ Guidance Document, 20 December 2011, International Maritime Organization. Regulatory Guidance 

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