Like many practices in aviation, Notices to Airmen, or NOTAMs, were derived from the maritime industry. “Notices to Mariners” emerged in the 19th century as a means of providing sailors up-to-date information on pilotage operations in local waters. The system “goes back to the early days of the telegraph,” Michael Hohm told BCA, “and the need to provide these notices because, just like aviation charting and reference material that is updated and reissued periodically, mariners needed to ...


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