3. VERTICAL FAN MODE
3-10
3.13
Interpreting the Display
3.13.1
How the picture is painted
The sounding beam is emitted and the information (target echoes) obtained by the
beam appears in the corresponding sector as it appears on the sonar mode. The dif-
ference is that the training is performed only in vertical direction. It forms a sounding
area of a half-circle (like a slice of watermelon) to observe a vertical section of under-
water conditions.
3.13.2
Port-stbd picture
You can see fish echoes at the center-right of the CRT. The bottom is displayed wider
as the distance from the ship’s position increases. Therefore, it may be difficult to dis-
criminate bottom fish.
Mode
Sounding beam
Screen display
Vertical
fan mode
Select the bearing of the sounding beam
by TRAIN control, the sounding sector
center by the TILT control and the display
area by the SECTOR control.
Example for sector angle
60°
180˚
0˚
Sector center
Bow
Tilting angle
Display
area
60°
60°
60°
0°
0°
0°
180°
180°
180°
Fish school
Bottom
Own ship
Own ship
Own ship
STBD
PORT
Summary of Contents for CH-37BB
Page 1: ...COLOR SECTOR SCANNING SONAR CH 37BB OPERATOR S MANUAL www furuno com Model ...
Page 10: ...SYSTEM CONFIGURATION viii This page is intentionally left blank ...
Page 40: ...3 VERTICAL FAN MODE 3 12 This page is intentionally left blank ...
Page 44: ...4 3D MODE 4 4 This page is intentionally left blank ...
Page 48: ...5 PRESENTATION MODE 5 4 This page is intentionally left blank ...
Page 52: ...6 CUSTOM MODE KEYS 6 4 This page is intentionally left blank ...
Page 58: ...7 SYSTEM MENU 7 6 This page is intentionally left blank ...
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