Honda Hondex HE-773-III-Di Operation Manual page 22

Bottom Sonar Mode
Range: 0°~180° in 1.8° steps.
0°: Forward direction for right display, 180°: Forward direction for left display
1
key to rotate clockwise
key to rotate counter-clockwise.
Train
Scan direction:
Counter-clockwise
Right display: Black circle
Left display: White circle
17
Scan direction:
Clockwise
Angle for train center location
Train center is shown in
red color.