Sonar Images by Harold E Egerton  (1903 - 1990)    Inscribed / Signed 1986    Black and white photos and charts, diagrams

In this book Harold E. Edgerton points out the various types of Sonar search devices in use today (1986). THe author illustrates Sonar applications to a wide range of examples that will help those using Sonar to observe what is in the , on the bottom of the sea, and in the sediments, He explains that sonar is important and valuable for two reasons: first, sound waves travel, great distances in water without attenuation, and second sound waves can penetrate sediments to locate concealed targets

  This book examines the many kinds of sonar recorders, depth finders, and side-scan sonars that proliferate in the marketplace and predicts additional equipment and usage to be developed.

 Among its features, this book:

 gives examples of the search for an identification of washed wrecks on the sea bottom.

 explains the use of sonar for geology studies Underwater.

 emphasizes the importance of the recorder in the sonar system.

list several manufactures of sonar equipment.

Dr. Harold he Edgerton (Institute, Professor Emeritus) at the Massachusetts Institute of Technology, has earned international recognition for his achievements in the related feels stroboscopy ultra high speed, photography, and Sonar. Dr .Edgerton is co-author with DR James R. Killian Jr. of Moments of vision a new edition of Flash! Seeing the Unseen by Ultra High Speed Electronic Flash Strobe. He is the author of numerous technical articles in as a member of several technical societies