Chapter 7 — BASIC FIRE CONTROL 



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POSITION KEEPER 



RECEIVER 



ANGLE SOLVERS 



4.191 

 Figure 7-15.— Torpedo data computer Mk 4. 



Computing Tests 



As sonar tracks a moving target, constantly 

 changing inputs are fed to the computer. In- 

 stantaneous values of these inputs are used by 

 the computer to solve ballistic computations 

 and to predict future target positions. The com- 

 puter's solution is therefore based on an infinite 

 number of static (still) problems. As relative 



motion rates are integrated with time to generate 

 computer changes in target position, the problem 

 becomes dynamic. To test the computer's accu- 

 racy, consequently, both static and dynamic 

 tests are run. 



• Static tests: Static tests check the overall 

 operation of the computing system in a stand- 

 still condition. In this type of test, appropriate 



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