Chapter 7 — BASIC FIRE CONTROL 



ring dial against the diamond index on the outer 

 ring dial. 



Range Dials 



The counters between the target and own ship 

 dial groups show generated horizontal sonar 

 range (870 yards). The dial to the left of the 

 range counters indicates range rate (2 knots), 

 which is the rate in knots at which horizontal 

 range is changing. 



The dials just discussed are only a few of 

 the many that you must be able to interpret. 



Of particular importance is the ability to inter- 

 polate (to "read between the lines") and to note 

 direction of change of the dial readings. 



Our discussion of the fire control problem, 

 and of the equipment used to solve the problem, 

 was necessarily restricted to fundamentals. Com- 

 puter mechanisms, fire control nomenclature, 

 antisubmarine weapons, and recorder traces were 

 only briefly covered, serving to acquaint you with 

 the problems involved in making attacks on enemy 

 submarines. You need to study many technical 

 manuals, and other training courses, to fully 

 comprehend the duties of a Sonar Technician. 



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