Our country and its resources; . issued by theHydrographic Office, which are ac-cessary to the maritime include such volumes as Amer-ican Practical Navigator, List ofLights, Intel-national Code of SigDais, Line of Position Tables. AfricaPilot. British Island Pilot. Mediter-ranean Pilot, etc. The Hydrographic Office supplies all charts and navigational publicstioiis, whatever their character, to hydrographic offices the British Ad-miralty is. of course, the largest andmost efficient. The United Stateshas had to depend very largely uponcharts issued by the British Admi-ralty, not onl
Our country and its resources; . issued by theHydrographic Office, which are ac-cessary to the maritime include such volumes as Amer-ican Practical Navigator, List ofLights, Intel-national Code of SigDais, Line of Position Tables. AfricaPilot. British Island Pilot. Mediter-ranean Pilot, etc. The Hydrographic Office supplies all charts and navigational publicstioiis, whatever their character, to hydrographic offices the British Ad-miralty is. of course, the largest andmost efficient. The United Stateshas had to depend very largely uponcharts issued by the British Admi-ralty, not only for information butfor the actual charts themselves, sothat the number purchased in thepast year was 19,222. Altogetherat the end of the fiscal year theUnited states depended upon theBritish Admiralty for 1,494 indi-vidual charts of various parts of theworld. These, however, are rapidlybeing reproduced by the Hydro-graphic < mice by a photolithographicprocess on zinc plates. The result THE THREE GREAT GOVERNMENT SURVEYS LSI. A GREAT BRASS BRAIN—THE WONDERFUL TIDE PREDICTOR 13! nlR CoINTKY AND ITS RESOURCES Of this reproduction will be both tosave the purchase price of suchcharts from a foreign governmentand to make the United States inde-pendent of any foreign governmentfor the supplying of world chartsto its own navy. Navigational charts to the numberof 123,1^8 and pilot charts to thenumber of 205,226 were published on a large scale and covering theapproaches to the Panama Canal,has been issued. Pilot charts are ingreat demand, showing, as they do,tracks of just past storms, prevail-ing wind directions, compass varia-tion and other maritime information,making them extremely valuableeven to a vessel well supplied withregulation charts.
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Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookpublishernewyo, bookyear1917
