Keepers Speaking Trumpet, used before the days of electric bull horns to communicate farther than a person could shout.
The U.S. Coast Guard Museum, Seattle, Washington
My Boating Adventures & Adventures in Boating Safey
The U.S. Coast Guard Museum, Seattle, Washington
Keepers Speaking Trumpet, used before the days of electric bull horns to communicate farther than a person could shout.
Boating Safety Tips, Tricks & Thoughts from Captnmike 
