Lowrance electronic lra-1800 Manual Do Utilizador

11 

1. Line up the bow of your vessel with a point of reference, like a penin-

sula, lighthouse or other stationary target. 

2. Press 

, highlight 

 and press 

. Press 

→ to select 

 and press 

. That will place an arrow on each side 

of the green Heading Line. 
3. Use 

← → to adjust the position of the green heading line, so its line 

to the reference point's radar image matches your bow's actual line to 
the reference point. 
4. Press 

 to remove the heading line arrows from the display. 

Adjust Tune 
Tuning should require no adjustment during the life of the unit. We 

strongly recommend you do NOT adjust Tune settings yourself. 
This feature is intended for use only by trained technicians. If for some 

reason you need to use this function, consult your dealer or customer 

service about the software updates necessary for tuning.