Simrad NSO Operation Manual page 69

Spiral-turn
Spiral-turn makes the boat turn in a spiral with a decreasing or increasing radius. This
feature may be used for circling fish or when searching an object on the seabed.
If the Change radius is set to zero, the boat will turn in a circle. Negative values indicate
decreasing radius while positive values indicate increasing radius.
Initial radius
Change of radius per turn
Zigzag-turns
While sailing in a zigzag pattern,
you set the initial course change
before the turn is started.
During the turn you can alter
the course change and the leg
distance.
The main course can be changed
by turning the rotary knob.
A = Initial course change
B = Course change
C = Leg distance
Course change
Leg distance
Square-turn
The square-turn feature makes
the boat automatically turn 90°
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distance.
You can at any time during the
turn change the distance of the
leg until the boat makes a new
90° turn. You can also at any time
change the main course by turning
the rotary knob.
Leg distance
68 | Autopilot operation
Turn parameter
Turn parameter
Turn parameter
Range
33 ft - 3281 ft
10 m - 1000 m
-164 ft - +164 ft
-50 m - +50 m
Range Change per step
4° - 140°
82 ft - 9843 ft
25 m - 3000 m
Range Change per step
82 ft - 9843 ft
25 m - 3000 m
Change per step
10
10
5
2
B
A
Default
4
50 1641 ft
25 500 m
Default
50 1641 ft
25 500 m
Default
656 ft
200 m
66 ft
20 m
C
28°