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, device and method for transrating file based assets
Identifying a characteristic of an individual utilizing facial recognition and providing a display for the individual
Polypeptides and immunizing compositions containing gram positive polypeptides and methods of use
Method and system for updating device management application meter read logic
Method and apparatus for distributing promotional materials
Method for manufacturing and reoxidizing a TiN/Ta.sub.2O.sub.5/TiN capacitor
Pandemic protocol for emergency dispatch
  Randomly Featured Patents
Manufacturing method of image-forming apparatus
Method of constructing a backup path in an autonomous system
Dispenser apparatus especially for liquid toner concentrate
Diamond-like carbon films with low dielectric constant and high mechanical strength
Photomask arrangement protecting reticle patterns from electrostatic discharge damage (ESD)
Sensing contact probe
Multilayered construction for resistor and capacitor formation
Power circuit tester apparatus and method
Dart holder
Method for modulating volume samples using gradient magnitudes and complex functions over a range of values