. Electronic navigational aids; loran, radiobeacon, and radarbeacon systems and loran, radio-direction-finder, and radar ship equipment. Loran; Radar. 26 OCEAN ELECTRONIC NAVIGATIONAL AIDS. Figure 2-5.—A modern radio direction finder installed aboard ship. Cape Cod Radiobeacon, Massachusetts, and Point Arguello Radiobeacon, California, are high-power class A radiobeacons which have effective ranges of about 400 miles. The most powerful sound-in-air fog signals under favorable conditions may be heard at distances of 10 to 15 miles, but their ordinarily dependable range is not over 5 miles, and,
. Electronic navigational aids; loran, radiobeacon, and radarbeacon systems and loran, radio-direction-finder, and radar ship equipment. Loran; Radar. 26 OCEAN ELECTRONIC NAVIGATIONAL AIDS. Figure 2-5.—A modern radio direction finder installed aboard ship. Cape Cod Radiobeacon, Massachusetts, and Point Arguello Radiobeacon, California, are high-power class A radiobeacons which have effective ranges of about 400 miles. The most powerful sound-in-air fog signals under favorable conditions may be heard at distances of 10 to 15 miles, but their ordinarily dependable range is not over 5 miles, and, under unfavorable conditions, they are lost at dis- tances shorter than this. The coast lights are visible for 15 to 20 miles and large lighted buoys for about 9 to 12 miles. It is therefore readily seen that the radiobeacons have a much greater range of usefulness, in fog as well as in clear weather. This is illustrated by the fact that on the outside Atlantic coast of the United States, north of Cape Hatteras, there are but 19 radiobeacons. This length of coast requires five times this number of sound fog signals, and they are effective over only 2 percent of the area served by the radiobeacons. The same length of coast has 150 outside lights. In order to lessen interference, the power of radiobeacons is limited to that. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States. Coast Guard. Washington, U. S. Govt. Print. Off.
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