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VRF charts contain information about seaports. For example, 00 - 50 in the formation block for HNL seems to be for a waterway:

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Another example is 23W for 1C9:

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Where are these conventions explained? I can't seem to find them in the Legend or User Guide.

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"00 - 50" means a landing surface at 00 feet MSL, unlighted, and 5000 feet (nominal, 4970-5069 actual) long.

At aerodromes with both land and water surfaces, it is customary to suffix the water ones with "W" (pronounced Water, not Whiskey) to avoid confusion.

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  • $\begingroup$ Do you have a reference for the W suffix? I found a reference about 00 - 50 on page 16 of the Aeronautical Chart User's Guide. $\endgroup$
    – rvernica
    May 20 '20 at 4:32
  • $\begingroup$ @rvernica I've never looked for a reference, sorry. $\endgroup$
    – StephenS
    May 20 '20 at 17:59

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