Simrad EQ 55 Technical Information PDF herunterladen (Seite 74)

950-70017001/Iss 1.2 EQ-55 Operators Manua

Page 3.6 Principles of Operation of an Echo Sounde

Kongsberg Simrad Mesotech Ltd.

Port Coquitlam, BC - Canada

Figure 3.3 A representation of a transducer beamwidth

The center of the sound beam is the most intense, then as you move out towards

the sides of the sound beam there is a point where the intensity of the sound is

1/2 what it was in the center. The distance moved is the "beamwidth". It is

nothing more than a number telling you if your transducer is functioning more

as a spotlight (a narrow beamwidth) or as a floodlight (a wide beamwidth) See

figure 3.3

A narrow beamwidth transducer will do a better job of showing two separate fish

schools that are close to each other (see figure 3.4), whereas a wider beamwidth

will tend to show them as one large school (see figure 3.5). Since a narrow

beamwidth transducer focuses the sound better, it is usually capable of seeing

deeper targets than the wider beamwidth transducer.

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Simrad EQ 55 Technical Information Seite 74