Simrad PI32, Руководство оператора, Страница: 79 / 268

Operational procedures
67
857-164636 / Rev.A
Special features for trawl marker lines
When you have chosen a graphic presentation, you can choose
to superimpose the information from the echo sounder, and then
add marker lines to see where your sensors are located in
relation to the bottom and fish echoes. When you use a pelagic
or bottom trawl, the PI32 offers certain special features to
provide additional information.
(A) = Numeric depth display
(B) = Headrope marker line
(C) = Footrope marker line
(D) = The value entered (calculated) for the Manual trawl
marker
The recommended sensor configuration to monitor the trawl
opening is to use one Height or Depth sensor on the headrope,
and one Depth sensor on the footrope. However, if you only use
one of these sensors, place it on the headrope. The PI32 will
then manually draw the trawl opening markers for you provided
that you enter the typical height of the trawl opening.
The following parameters will provide the extra information
related to trawl markers:
•
Headrope and footrope sensors: You need to tell the PI32
which Depth and/or Height sensor(s) you have placed on the
footrope and/or headrope of the trawl.