Interpreting the display, Seabed echoes, Figure 11-1 seabed echoes – Furuno CSH-53 User Manual

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11-1

INTERPRETING THE DISPLAY

Seabed Echoes

When the tilt angle is widened, the seabed echo illustrated be-
low will appear on the display. When the tilt is narrowed, the
seabed trace becomes wider and weaker. By observing the sea-
bed condition on the display, the skipper can prevent net dam-
age.

(A) Flat seabed

Tilt angle: 10

to 15

(B) Flat seabed

Tilt angle: 20

or more

(C) Sloping seabed

Tilt angle: 20

or more

Seabed

Shallow bottom
is displayed in
a strong color
and with a
short tail.

Seabed is displayed
narrower and in
stronger colors when
compared to (A).

Narrow tilt angle
Only half of
vertical beam width
captures the seabed.

The deeper seabed
echo is displayed in
a weak color and
with a long tail.

Figure 11-1 Seabed echoes