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Article | REF: RAD6714 V1

Introduction to Active Sonar Detection. Basic Notions

Author: Denis PILLON

Publication date: November 10, 2017

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4. Propagation losses (TL)

4.1 Notion of convergence zone (ZC)

Zones of convergence (ZC) (figure 5 ) occur when the emitter is close to the surface (HMS) and the rays plunge towards the bottom due to a negative celerity gradient (figure 14 ). If the water level is high enough, these rays will be refracted and rise towards the surface, concentrating in a small ring.

A bathycelerimetric profile conducive to this type of acoustic field is the so-called "November",...

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Propagation losses (TL)
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