Furuno CSH-84 - Manual (Page 21)

2-3
Selecting a Display Range
Operate the RANGE control to select a display range. The range
selected appears at the top of the screen.
Setting the Tilt Angle
The tilt angle shows the direction to which the sound wave is
emitted. When the sound wave is emitted horizontally, the tilt
angle is said to be zero degrees and when emitted vertically, 90
degrees.
To set a tilt angle, operate the TILT lever. Watch
the tilt angle indication at the top right corner
on the screen. The tilt angle can be set in one-
degree steps from -5 (upward) to 60
°
(down-
ward) degrees.
Finding a proper tilt angle is important when searching for fish.
Seabed echo and tilt angle
Case 1: Tilt angle 30 to 40 degrees
This tilt angle will display the entire seabed since it is captured
by the full width of the beam.
Case 2: Tilt angle 10 to 20 degrees
This tilt angle will only display half the seabed since it is only
captured by the lower half of the beam.
Case 3: Tilt angle 0 to 10 degrees
This tilt angle may or may not capture the seabed since the re-
turning echo is weak.
R400
T 15 Tilt
angle