Purse seine
The gear symbol is provided as a tool to help you plan and shoot the purse seine. The symbol is intended to be used in a structured sequence that starts when you plan to shoot the purse seine.
Trawl
If you select a single or dual trawl in the Fishing Gear function, the SU90 system displays a trawl symbol in the echo view. The size and location of the image reflect the measurements you added in the Fishing Gear Setup dialog box.
The trawl image appears aft of the vessel symbol. When your vessel turns, the trawl presentation will reflect this, but the location and movements could be more precise. If you want an accurate trawl positioning, you must equip the trawl with relevant positioning sensors and connect the data
to the SU90 system.