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Main classification of navigational notices
British Notices to Navigation are published by the British Naval Hydrographic Bureau and widely distributed, mainly weekly and annual summaries. The contents of the weekly edition are as follows: ① official notice, which is important and effective for a long time; (2) Temporary notice, effective in a short period; (3) Advance notice means to release the notice of the changes that will happen in advance. The weekly magazine also publishes navigation warnings that are still valid and are broadcast by the World Radio Navigation Warning System. The annual summary is issued on New Year's Day every year, with permanent notice, temporary notice and notice, which will remain valid until the end of last year.

China Nautical Notice is edited and published by China Nautical Books Publishing House, with two versions in Chinese and English.