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5. ECHO SOUNDER MODE
5-12
5.7 Measuring Depth, Distance
You can measure depth and distance (picture advance set for “speed sync”)
from own ship to a location with the trackball mark. Use the trackball to place the
trackball mark on the location. The trackball mark shows depth on its horizontal
axis and distance on its vertical axis.
N
W
S
E
Depth
Distance from own
ship to mark
Trackball
mark
Range
scale
NUMERIC/GRAPHIC
DATA DISPLAY
80
40
25
1800m
800
0
How to measure depth and distance on the echo sounder display