Operation Manual

Operation | 21
Press either the or key to select the direction in
which to make the spiral-turn and start.
During the turn the “change in radius” can be adjusted
and the number of feet or meter is how much the radius
is changed for each circle turned.
If the “change radius” is set to zero, the boat will turn in
a circle.
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Negative values indicate decreasing radius while positive
values indicate increasing radius.
Increasing radius Decreasing radius
Turn parameter Range
Change
per step
Default
Initial radius
33 ft - 3281 ft
10 m - 1000 m
10
10
656 ft
200 m
Change of radius
per turn
-164 ft - +164 ft
-50 m - +50 m
5
2
66 ft
20 m
The unit for radius is the same as the unit set for depth
(feet or meter).