Another Marconi instrument of great value is the Direction Finder, which during the Great War-was the means of providing the Admiralty with accurate information regarding the movements of enemy ships and aircraft. It is now available in a greatly improved and simplified form for use in the mercantile marine and its value as an aid to navigation has been amply demonstrated. With this instrument vessels can take relative bearings of any wireless stations which may be trans-mittting—which all are at very frequent intervals—and as the direction finder is unaffected by fog or darkness, it is available when other means fail, so that a position can always be' obtained and a vessel temporarily out of-her bearings need not drift blindly to disaster. These, too, it will be noted from the table given, are 4 very cheap.
Text read from the printed page and cleaned; old type leaves the occasional error.