| 摘要 |
<p>A navigation sonar is described which incorporates an outboard part 20 and inboard part 22. An outboard part 20, which in use may be installed on an outboard side of a hull, comprises a transducer array (40) of sonar elements (and see figure 3), the sonar elements including a portion thereof operable both in receive and emit modes (A, figure 3), the remainder of the elements being operable only in a receive mode. The outboard part also includes signal processing (44) and conditioning elements (42) so that the driving of a sonar signal, and the detection of a resultant echo, is contained therein. The outboard part sends a digitised echo signal to an inboard part 22 of the sonar, where it can be processed and rendered into a graphical display, or used to trigger an alarm system.</p> |
