Jean-Paul Marage is the author of Sonar and Underwater Acoustics, published by Wiley.

Yvon Mori, Consultant, France. Although retired from his main activities as an electronic engineer, he is still Chairman of the SEE French Riviera (Société de l'Electricité, de l'Electronique et des Technologies de l'Information et de la Communication) and the IEEE in France. He is also a COFRAC Auditor for programme 38 and trains engineers in mechanical vibration, shock analysis and electromagnetic compatibility for major companies. Before retirement he was, for 37 years, the manager of the environmental test and evaluation laboratory at Thales Underwater Systems in Sophia Antipolis, France.