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When speed or depth data appears in red…
Speed or depth data containing error appears in red.
Ships speed Cannot find reference echo in respective tracking mode.
Tide speed Cannot find echo in given layer.
Set depth Depth set is invalid. In ground tracking mode, depth should be shallower
than 7 m, or in the water tracking mode no more 3/4 of seabed depth.
Measured speed When measured speed (tide or ship's) is unreliable.
Course plot display
Figure 14 Sample course plot display
NOTE 1: Ship's course and heading displays can be switched
with display mode as follows, by a DIP switch in the
display unit.