Furuno CSH-84 manual Selecting a Display Range, Setting the Tilt Angle, Seabed echo and tilt angle

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.

R400 Tilt

T 15 angle

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.

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