By a letter - for example 2 parallel runways 'L' and 'R' - for 3 'L', 'C' and 'R'. |
By a letter - for example 3 parallel runways 'L' and 'R' and the central has no letter. |
By a letter for 2 parallel runways. |
By a number like '0' and '01' for 2 parallel runways. |
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