Furuno TS-331A - 2. SONAR OPERATION; Choosing a Sonar Mode

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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