INTRODUCTION TO SONAR 



Publications- continued 



Military Requirements for Petty 



Officers 3 & 2, 6 

 Training I^iblicatlons for Advancement 



in Rating, 3, 6 

 List of Training Manuals and 

 Correspondence Courses, 7 

 Pulse length, 96 



Q 



Qualification for advancement, 2 

 Quals Manual, 3, 6 

 Quenching, 45 



R 



Range rate, 127 

 Radiotelephone, 134 

 Rating courses, 7 

 Reading BT trace, 73-75 



surface temperature, 72 

 Record of Practical Factors, 2, 6 

 Reflections, sound wave, 43 

 Refraction, sound wave, 45 

 Relative bearings, 22 

 Relative motion, 27 

 Remote indicators, 133 

 Resistance, 173 

 Resistors, 161 

 Resuscitation, 156 

 Reverberations, sound, 44 

 Rheostat, 161 

 RLI operation, 98 

 Rotating directional transmission (RDT), 97 



Safety 



precautions, general, 154 



power tools, 155 

 Scanning sonar, 92 

 Searchlight sonar, 92 

 Sea surface temperature reports, 84 

 Semiconductors, 169-171 

 Sending code, 139-141 

 Service ratings, 1 



Shallow water effect on transmitted sound, 49 

 Shipboard antisubmarine weapons, 110 

 Shipboard bathythermographs, 61-71 

 Ships, (A/S), 14 

 Signal codes, 134 

 Sliprings, 174 



Sonar information, 20 



Sonar position quantities, 116 



Sonar system, block diagram, 95 



Sonar Technician rating, 2 



Sonobuoys, 108 



Sound 



audible range, 34 

 characteristics, 38 

 description, 34 

 propagation, 45 

 speed, 46 

 waves, 36-38 

 Sound-powered phones, 132 

 Sound wave reception, 96 

 Stern line indicator, 22 

 Study methods, 7, 8 

 Subject matter courses, 7 

 Submarine 



armament, 13 



antisubmarine weapons. 111 

 bathythermograph, 58 

 communication methods, 144 

 general characteristics, 12 

 history and development, 9 

 locatii^ requirements, 20 

 propulsion, 13 

 SUBROQ 13 



Tactical range recorder, 127-130 

 Tape recorder, 104-108 

 Target angle, 30 

 Target aspect, 29 

 Temperature effect, 46, 57 

 Temperature profiles, 73-76 

 Terminal designations, 159 

 Test equipment, 157-159 

 Test methods 



cables, 161 



capacitors, 165 



coils, 162 



continuity tests, 172 



current, 173 



resistance, 173 



resistors, 161 



semiconductors, 171 



transformers, 164 



tubes, 166-169 



voltage, 173 

 Thermoclines, 48, 58 

 3-M system, electronic equipment, 147 

 Torpedoes, 13 

 Training aids, 8 

 Training courses, 7 



180 



