Garmin gpsmap 555 Manuale Utente

Getting Started

Minimum Safe depth—select the minimum safe depth for your 

boat. Refer to your boat specifications for more information.
Shallow water alarm—only available if you are receiving NMEA 

sonar depth data. Select 

 or 

.

Minimum Overhead Clearance—select the minimum overhead 

clearance for your boat. Refer to your boat specifications for more 

information.
aiS alarm Range—select the distance in which an alarm will 

sound if an AIS vessel nears your boat (

).

aiS alarm Time To—select the time within which an alarm will 

sound if an AIS vessel is on track to intersect the Safe Zone around 

your boat (

).

If a water speed wheel is detected, a message will ask if you want to 

calibrate it now. Select 

 or 

.

1.  Press and release the   

 key.

2.  Select 

.

To allow the unit to automatically adjust the backlight based on 

ambient light, select 

(automatic backlight is 

available only on the GPSMAP 525, 526, 555, and 556).

1.  Press and release the   

 key.

2.  Select 

.

3.  Press left or right on the 

Rocker to switch between modes.