Simrad SP90

System description1.4 Functional descriptionIntroductionThe basic principles of the SP90 sonar are unique because of the256 separate transmitter and receiver channels with theirtransducer elements spread around on the cylindrical transducerarray.The transmission, reception and data processing are undercomputer control, and the powerful capabilities of the sonar are theresults of sophisticated digital signal processing software and stateof the art hardware.Functional principlesWhen the Omni beam is tilted, the total beam picture can becompared with folding an umbrella, which means that all beamsin 360 degrees around the vessel have the same tilt angle.Figure 3Omni beamThe beam can be tilted from +10 up to -60 degrees down.In addition to seeing the target from above, it is also possible to seethe target from the side, by using the vertical slice presentation. Inthis case the beam covers a continuous vertical beam from 0 to -60degrees in one transmission.850-164511 / B7