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2. SONAR OPERATION
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2.1.2 Sector mode
This mode is used for operating the sonar to scan in a sector area. The
transducer location is in the middle of the sonar image display with the zero
heading vertically down on the display. The user can adjust the scan sector size
by selecting the desired sector size from the Sector combo box in the Vertical
Sonar settings dialog box. Sector size can be from 0° to 360° in 10° increments.
The user can move the mid-point of the sector to any angle in 10° increments by
selecting the desired train angle from the Train combo box in the vertical sonar
settings dialog box. The user can use the Zoom Factor command in the View
menu to enlarge or shrink sonar images and the mouse can be dragged to
position the image where desired.
Ground rope
of trawl
Fishintrawl
Sector mode display
Sector mode concept