Furuno CH-270 - Manual (Page 25)

2. HORIZONTAL MODE
2-5
2.5 Choosing Train Center
The [TRAIN] control chooses the center direction of the detection range. The range of
adjustment is 0
° to 354° in increments of 6°. The chosen bearing is shown with a filled
circle, the train indicator, on the bearing scale.
0 ° (360°) → 6° → 12° → 18° → ... 354°
Train indicator
Sector
Train center