Resources Contact Us Home
Harbor radio navigation system

Image Number 6 for United States Patent #4071845.

A radio beacon navigation system wherein buoys placed at predetermined locations in a harbor or channel transmit identification signals. Every buoy is assigned a unique carrier frequency upon which is transmitted a signal capable of identifying the buoy. Each buoy is shown on harbor charts according to the unique properties of its signal. Radio receiving means carried aboard vessels navigating through the harbor or channel include means for determining the identity of the buoy from which signals are received and the direction from which the received signals emanate.

  Recently Added Patents
Display apparatus having a semi-penetration layer and a sealing unit
Methods and systems for presenting an inhalation experience
Systems and methods for simultaneously configuring multiple independent backups
Charged particle beam apparatus
Mass spectrometry device and method using ion-molecule reaction ionization
Integrated circuit packaging system with heat slug and method of manufacture thereof
Personalized dashboard architecture for displaying data display applications
  Randomly Featured Patents
Automated metadata validation
Strategies for disseminating media information using redundant network streams
Helicopter transportable mud pump
LCOS column memory effect reduction
Method and apparatus for reducing current consumption
Power control in cognitive radio systems based on spectrum sensing side information
Shielded electrical connector
Heat pump systems
Lateral packaging for holding together superimposed articles
Method and apparatus for providing related words for queries using word co-occurrence frequency