Furuno CH-37 - Manual (Page 53)

3-9
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.
3.10 Interpreting the Display
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 Screen Display
Vertical
Fan
Mode Freq: 60 kHz
0
°
(1) Bearing of the
sounding beam
Bow
180
°
0
°
Tilting direction
(2) Sector center
(3) Display area
TX
RX
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.
(1) Bearing of the
sounding beam
180
°
(2) Sector center
(3) Display area
16
°
13
°
16
°
13
°
Figure 3-10 How the vertical fan picture is painted