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
Serial transmission system including transmitter apparatus and receiver apparatus, for use in transmission of AV data
Rim for a TV receiver
Preserving privacy of digital communication information
Method of making a CIG target by spray forming
Distortion estimation for quantized data
Data scrambling in memory devices
  Randomly Featured Patents
Electrical edge connector
Heat sink with twist lock mounting mechanism
Rotation detecting device
Process for improving baking properties of unbleached flour
Slurry for CMP, and method of manufacturing semiconductor device
Semiconductor device
Door latch assembly
Subsea mud pump and control system
Jump rope device
Polyetherester elastomer