Operation Manual

References

199

850-165186 / Rev.B

Height reference: The Height sensor measures the distance

from the headrope to the bottom. If you use the PI54 echo

sounder, set Height reference to Bottom (default), and the

height mar ker will follow the bottom contour. If you even

define the delay correctly, you will be able to see the trawl in

true motion. If you do not have en active echo sounder, set

Height reference to Surface. The height will then be shown

with 0 m depth as reference, and the marker line will appear as a

nearly straight line some distance below 0 meters. The distance

from the 0 meter line and down to the marker line will be the

current opening of the trawl.