Furuno CH-270 - Manual (Page 44)

2. HORIZONTAL MODE
2-24
CLUTTER: Low intensity echoes, often caused by sediments in water, are painted on the
screen as a large number or random dots. This noise can be suppressed. The higher the
number (setting) the weaker the echoes which are erased.
TARGET KEY: Chooses target lock function among reverse, position and echo. For
further details, see paragraph 2.12.
LOCK MODE: Chooses how to track fish echo in “echo” target lock, automatically or
manually. For further details, see paragraph 2.12.
AUTO TILT: Turns automatic tilt on or off. The choices are
±2°, ±4°, ±6°, and ±10°.
Automatic tilt adjusts the tilt angle in the following sequence:
B
→ (B-A) → B → (B+A) → B → (B-A) → B → (B+A)…
B: Current tilt angle
A: Auto tilt setting
For example, the tilt angle is 30
° and the automatic tilt setting is 4°. Then, the tilt angle is
changed in the following sequence: 30 ° → 26° → 30° → 34° → 30°→ 26° → 30° → 34°…