/^(5f. 



PREFACE 



This book is written for the men of the U. S. Navy and Naval 

 Reserve who are seeking advancement in the Sonar Technician rating. 



At this writing the general rating of Sonar Technician includes 

 the service ratings of Surface Sonar Technician (STG) and Submarine 

 Sonar Technician (STS) at the Third and Second Class levels. The 

 general rating of Sonar Technician is at the First Class level and 

 above. Although the Surface and Submarine Sonar Technicians may 

 operate different equipment, certain practical factors and knowledge 

 factors apply to all Sonar Technicians. This book covers many of 

 the factors common to both ratings. 



The scope of this training course does not permit inclusion 

 of the fundamentals of mathematics, electricity, and electronics. If 

 you need such information, you should study the appropriate training 

 courses that appear in the reading list. Because of security classifi- 

 cation, some common sonar subjects cannot be included in this training 

 course, but may be found in classified courses and other publications. 



As one of the Navy Training Courses, this book was prepared by 

 the Training Publications Division, Naval Personnel Program Support 

 Activity, Washington, D. C, for the Bureau of Naval Personnel. 



First edition 1960 



Second edition 1963 



Revised 1968 



StocK Ordering No. 

 0500-036-0100 



