the.com/foghorn

A fog horn is the ocean's way of saying 'I can't see you but I know you're there.'

means A loud, low-pitched warning horn used by ships and lighthouses to signal their position when fog hides them from view.

from A straightforward compound of 'fog' and 'horn' — the instrument named plainly for its job. It emerged in the 1800s alongside steam-powered foghorns, which used compressed air or steam to blast a sound far deeper and more far-carrying than any hand-blown horn could manage, letting sailors 'hear' a coastline or another ship they couldn't see.

low frequency
low pitch travels farther through fog than high pitch
legal requirement
ships must sound signals in restricted visibility by law
cartoon legacy
inspired Foghorn Leghorn's booming rooster voice
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