Some Bottom-Reflection Loss Anomalies near Grazing and Their Effect on Propagation in Shallow Water

  • Ole F. Hastrup
Part of the NATO Conference Series book series (NATOCS, volume 5)


The bottom-reflection loss near grazing from a hard bottom, or from one that has a hard sub-bottom, can in certain cases be fairly high. This can result in higher propagation losses in shallow water than are usually expected. Two frequently observed cases have been studied, one where the bottom can propagate shear waves and another where the bottom is covered by a layer of soft unconsolidated sediments. The first case causes a low-frequency attenuation whereby an optimum frequency is created for the propagation, whereas the second case creates selected frequencies for which the propagation is poor.


Shear Wave Critical Angle Transmission Loss Reflection Loss Grazing Angle 
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Copyright information

© Plenum Press, New York 1980

Authors and Affiliations

  • Ole F. Hastrup
    • 1
  1. 1.SACLANT ASW Research CentreLa SpeziaItaly

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