Noise level (NL) and directivity index (DI)
Introduction to Active Sonar Detection. Basic Notions
Article REF: RAD6714 V1
Noise level (NL) and directivity index (DI)
Introduction to Active Sonar Detection. Basic Notions

Author : Denis PILLON

Publication date: November 10, 2017 | Lire en français

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6. Noise level (NL) and directivity index (DI)

For ASDIC, the position and mounting of the base on these small, noisy boats probably resulted in a high level of self-noise (SN) even at medium speed (10 knots), hence our choice of a level equivalent to sea 6 (figure 10 from [RAD6712] ).

Although American shipyards have undoubtedly mastered BP, the US Navy's HMS, at more than 25 knots, can't avoid being confronted...

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