Furuno CH-37 - Manual (Page 30)

2-14
2.13 Relocating Fish School for Easy Observation
When a fish school is near the edge of the screen and inconve-
nient for observation, use the “ ” expanded sonar mode and
adjust the TRAIN control (off-center function) to relocate the
fish school close to the screen center.
Fish school
Own ship
Fish
school
Figure 2-12 How to relocate fish school
2.14 Finding Fish School Center
When you want to find the center depth of a fish school, change
the tilt angle and observe the presentation as follows:
1. Select a narrow sector range (45
°
) and capture the target
echoes.
2. Adjust the tilt angle with the TILT control slowly and ob-
serve the change of the presentation color.
3. The echo presented in the strongest color is the center of
the fish school.
Tilt
setting RANGE
TILT
R 800
T 8
°
Figure 2-13 How to find fish school center