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Values

Flight rules

Code/Flag Figure	Description	Status
0	Low instrument flight rules - Ceiling < 500 feet and/or visibility < 1 mile	Operational
1	Instrument flight rules - Ceiling < 1000 feet and/or visibility < 3 miles	Operational
2	Marginal visual flight rules - 1000 feet =< Ceiling < 3000 feet and/or 3 miles =< visibility < 5 miles	Operational
3	Visual flight rules - Ceiling >= 3000 feet and/or visibility >= 5 miles	Operational
4-6	Reserved	Operational
7	Missing value	Operational