Where are the seaport conventions for VFR charts explained?
&quot;00 - 50&quot; 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 &quot;W&quot; (pronounced Water, not Whiskey) to avoid confusion.