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What Are NOTAMs? Notices to Air Missions Explained

Pilot Institute

The start and end dates and times are coded in YYMMDDttt format (UTC time). B) 2106231700 is the start time and date in UTC. C) 2106232300 is the end time and date in UTC. FAR 91.103 states, “A pilot in command shall, before beginning a flight, become familiar with all available information concerning that flight.”

NOTAMs 52
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Mexico: 2023 Business Aviation Destination Guide

Universal Weather

If a pilot in command (PIC) or 3rd-party provider just files a flight plan with ATC, it won’t be valid until the above approvals can be obtained. These airspace closures are usually between 1500-2200 UTC Monday-Friday but can vary depending upon military needs.