on my way out the door, but, they are called aids to navigation (ATON) and come under the coast guard.

can be found on nautical charts, but only listed as 'horn'. no timing indicated.

someone, somewhere, may have this data in a book or on line...

lights are different. charts give height of the light, how far it can be seen, color and frequency.

horns can be deceiving, esp in the fog, which is when they run.

i know you have dial up, but you can readily find the sound of the golden gate horn online.

impressive!

add to your list of things to do when you come across broadband!