Furuno CH-37 - Manual (Page 61)

4-3
4.3 Changing 3D View Scale Mode and Scale Selection
The depth (z-axis) of the graph is displayed in either “TIMe” or
“DISTance” scale mode. The depth can be set to 500 or 1000
meters in the distance scale mode, or 1/1, 1/2 or 1/4 in the time
scale mode. The fraction means graph update/number of trans-
mission. “1/4,” for example, means the graph is updated every
four transmissions.
These selections are made on the 3D VIEW SCALE and TIME
SCALE (or DISTANCE SCALE) lines of the BOTTOM/3D menu.
The time mode should be selected when speed data is not
being fed to the unit from navaids or speed log.
Depth
Depth
Frontal image Oblique image
Figure 4-4 Depth dimension in frontal and oblique images
4.4 Other Operations
The following operations are the same as those in the Vertical
Fan mode.
• Range Selection
• Rejecting Sonar Interference and Noise
• Horizontal, Vertical and Event markers
• TVG Adjustment
• Beam Width Selection
The selection of the bearing of the vertical fan beam and auto
train function are disabled, as the bearing of the vertical fan
beam is automatically selected to 90
°
in this mode.