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Table of Contents

1.0 PERFORMANCE PREDICTION

1.1 Sonar Equation Application

1.1.1 Source Level (LS)

1.1.2 Propagation Loss (NW )

Specular Model

Scattering Model

Attenuation Coefficient (ao )

1.1.3 System Noise Level (LN )

1.1.4 Recognition Differential (NRD )

1.1.5 Acoustic Interface Loss (ND)

Table of Tables

Table 1 Measured Values of Backscattering Coefficient, SB as a function of Bottom Slope

Table 2 Attenuation Coefficient in dB/kyd (ao )ao )

Table 3 Average Attenuation Coefficient in dB//kyd (ad) as a Function of Depth Used for Depth Sounding (T = 40 F)d) 

Table 4. Sea State

 

Table of Figures

Figure 1 Area illuminated by a conical beam

Figure 2 Function of the transmitted beamwidth, depth, and pulse duration

Figure 3. Deep Water Ambient Noise Levels