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
System and method for measuring an analyte in a sample
Socket type MEMS device with stand-off portion
System and method for the analysis of biodiesel
Methods, systems, and products for providing ring backs
Semiconductor element-embedded wiring substrate
Load balancing for parallel tasks
Accessing device via communication protocol selection
  Randomly Featured Patents
Chain saw attachment
Case structure for sensor structure attachable to and detachable from a shoe
Filter cartridge unit with adhesive interconnecting filter cartridge and end plates
Semiconductor arithmetic circuit
Video compression and playback process
Method and apparatus for interconnecting optical wave guides
Tracheal intubation guide
Molded semiconductor package
Opposed seam electrically heated cigarette smoking system
Method and apparatus for measuring a hydrophone parameter