How is the term "Coast" defined for FAA regulatory purposes?
Coastline means the territorial sea baseline. In the language of international treaties like UNCLOS, the territorial sea doesn't include internal waters, regardless of their size. NOAA confirms this, notes however also, that not all US court decisions follow that view. NOAA also provides a map to view the US territorial waters &amp; exclusive economical zone, which shows that the great lakes are neither.