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Hydrographic Manual
This Hydrographic Manual, Fourth Edition, by the National Ocean Survey was prepared under the able direction of Captain Robert C. Munson, Associate Director, Office of Marine Surveys and Maps, and represents the culmination of more than 160 years of experience in nautical surveying and marine charting. These contemporary instructions for hydrographic and related data surveys that define the applications of the most modern available technology will allow the second and third editions to be retired. In this fourth edition, extensive changes have been introduced in both format and content, the major changes are, of course, based on the use of modem automatic data collection and processing technigues. Few of the basic reguirements of hydrography have been altered. An attempt has been made to identify stringent specifications for hydrographic surveys and to describe survey methods and technigues of accomplishment that result in the most effective utilization of manpower and eguipment. I hope each salty old hydrographer who looks askance at what he considers to be radical departures from tradition is offset by one of our dedicated young crusaders from the binary generation who is convinced we are moving too slowly. If this is the case, then I believe a satisfactory balance has been achieved, thus this edition will retain the tradition of usefulness characterizing the previous editions. Recent streamlining of procedures between the completion of a hydrographic survey and the production of a nautical chart has added responsibility upon both commanding officers and those engaged in survey verification. In many areas, increased emphasis is placed on guality control, completeness, and cohesiveness of field survey data. Ouality of our data is as important as guantity. The shopwom adage that "miles bring smiles" can no longer be considered a hydrographic commandment. New ideas and information were received and added continually throughout the preparation period. Ultimately, however, editorial deadlines neared, causing the manuscript to be sent to the presses. Because the technology and state of the art of hydrographic surveying are dynamic, the National Ocean Survey will make a constant effort to keep this manual current by issuing periodic amendments and supplements. Readers are urged to make suggestions and advise us on improvements. Through your written comments, the manual can reflect changes in the state of the art. The many improvements in this edition stem directly from the enthusiastic response received from personnel throughout the NOAA fleet and at the Marine Centers and Headguarters. Space does not permit one to credit each person who contributed in a technical sense, although their efforts are sincerely appreciated: but special thanks must go to those who made major outstanding contributions: Betty V. Arozian, Gabriel J. Bren, Raymond H. Carstens, Donald R. Engle,L Y.Fitzgerald, Walter Forster II, Wayne L. Mobley, William J. Monteith, Robert K. Norris, Hugh L. Proffitt, Jack WALLACE, and Dale E. Westbrook.
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