(a) From time to time, the Coast Guard makes navigability determinations of specific waterways, or portions thereof, in order to determine its jurisdiction on those waterways. Copies of these determinations are maintained by the District Commander in whose district the waterway is located.

(b) If the district includes portions of the territorial sea, charts reflecting Coast Guard decisions as to the location of the territorial sea baseline for the purposes of Coast Guard jurisdiction are maintained by the District Commander in whose district the portion of the territorial sea is located.