Simrad AUTOPILOT SYSTEM AP50 Manuel D’Utilisation

 

Software Set-up Procedure 

20221032B

 141 

While at cruising speed, adjust the Rudder value by turning the 
course knob until the autopilot keeps the boat on a steady 
course. 
Counter Rudder 

 

Press the   (STBD) button to display the set course. Make a 90° 
course change (CTS) by rotating the course knob and observe 
the transition to the new set course. 
Press the   (STBD) button again to adjust the Counter rudder 
value, if necessary, according to the following: 

 

Counter rudder is the parameter that counteracts the effect of 
the boat’s turn rate and inertia. It is superimposed on the normal 
rudder response as provided by the rudder parameter. It may 
sometimes appear as if the autopilot tends to make the rudder 
move in the opposite direction of the turn (counter rudder). 

The figures illustrate the effects of various Counter rudder 
settings.  
Range: 0.05 to 8.00. 

                   

 

 

 

Go back to previous screen by pressing the 

 (PORT) button, 

make a new 90° course change by rotating the course knob and 
observe the transition to the new set course. Press   (STBD) 
button again to adjust the Counter rudder value if necessary 
Proceed to Speed Response by pressing the   (STBD) button 
or return to STANDBY mode by pressing the 

 (STBY) 

button. 

Automatic tuning 
If the boat steers satisfactorily, there is no need to perform the 
Automatic tuning. 
Automatic tuning is a feature that automatically sets the two 
main steering parameters (Rudder and Counter Rudder) by 
taking the boat through a number of S-turns. 

New course

New course 

New course

Counter rudder setting too 
low = overshoot response 

Counter rudder setting too high = 
sluggish and creeping response 

Correct setting of counter 
rudder = ideal response