Interpreting The Display - Furuno CH-37 Operator's Manual

3.10 Interpreting the Display

Vertical
Fan
Mode
Bow
180
(3) Display area
Select the bearing of the sounding beam (1) by TRAIN
control, the sounding sector center (2) by the TILT control
and the display area (3) by the SECTOR control.
3D VIEW SCALE: Determines the depth item, time or distance
for 3D display mode. (Requires optional equipment.)
TIME SCALE or DISTANCE SCALE: Selects z-axis scale of
3D picture.
This section provides the information necessary for interpret-
ing the display.
How the picture is painted
The sounding beam is emitted and the information (target ech-
oes) obtained by the beam appears in the corresponding sec-
tor as it appears on the sonar mode. The difference is that the
training is performed only in vertical direction. It forms a sound-
ing area of a half-circle (like a slice of watermelon) to observe
a vertical section of underwater conditions.
The bearing of the vertical sounding beam can be selected
manually or automatically.
Sounding Beam
(1) Bearing of the
sounding beam
0
Tilting direction
(2) Sector center
Figure 3-10 How the vertical fan picture is painted
Freq: 60 kHz
TX
16
180
13
RX
16
13
(3) Display area
Screen Display
(1) Bearing of the
sounding beam
0
(2) Sector center
3-9