Furuno TS-331A - Manual (Page 19)

11
2. SONAR OPERATION
2.1 Choosing a Sonar Mode
The TS-331A has three sonar display modes: polar, sector and locked. Choose
desired mode from the Mode menu.
2.1.1 Polar mode
This mode is used for operating the sonar to scan a 360° area. The transducer
location is in the middle of the sonar image display with the zero heading
vertically down on the display.
Ground rope
of trawl
Fish in trawl
Polar mode display
Polar mode concept