An instrument for recording echograms; an automated echo sounder.
- A curved bar probe for an echograph is fabricated by using a thin support on which is placed a bar of piezoelectric crystal.
- As seen from Fig. 2, the back signalling of the digital indication in the echograph can be so performed that the supervision line 50 does not coincide with the upper margin of the depth indication 8, but is displaced relative to this limit by a measure corresponding to the draught of the ship.
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