10. VIDEO SOUNDER OPERATION
10-12
10.4
Measuring Depth, Time
The VRM measures the depth and the time marker, time.
1. Rotate the [ENTER] knob to shift the VRM; counterclockwise to shift it upward,
clockwise to shift it downward. You may also use the cursor pad (
S
T
) to shift the
VRM.
2. Press the cursor pad (
W
X
) to adjust the time marker to measure time.
How to measure depth and time
VRM (white)
40.0
Depth to VRM
Time marker
50k
97
50
100
0
0'33"
Time for a scan line to travel
from the right edge of the
display to the cross-hair cursor
ft
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