# Where are the seaport conventions for VFR charts explained?

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

Another example is 23W for 1C9:

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

## 1 Answer

"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.

• 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. May 20 '20 at 4:32
• @rvernica I've never looked for a reference, sorry. May 20 '20 at 17:59