Abstract
The paper describes recent developments in the operation of the older types of navigational aids, lights, fog signals and radio beacons. A novel system of remote control is described and means for automatic operation of remote light stations discussed. Development of a system to give automatic indication of locally reduced visibility is described. A method of employing arc discharge lamps as navigation lights is mentioned. A new system for coding radio beacons is described. A policy for electrical power supplies at remote places is outlined, mention being made of the possible use of solar energy.
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