Over the summer a number of bells, gongs, and tappers have been stolen from buoys floating in Maine waters.
The buoys help boaters navigate in fog and at night: they also warn of potential dangers.
Coast Guard officials believe it’s possible that the bells are being sold to novelty shops or for scrap metal.
Coast Guard officials say the missing sound signals of the buoys creates a very dangerous situation, as boaters rely on the noise for the water navigation equivalent of a traffic signal.
Replacing them can cost taxpayers up to $1,500 each.
Anyone who has information is being asked to contact their local Coast Guard unit, or make an anonymous report to the marine safety hotline at 1-800-682-1796.