Configuring the Chartplotter50 GPSMAP 400/500 Series Owner’s ManualTo label tanks as names:1. From the Home screen, select Configure > Communications > NMEa2000 Setup > Label devices > Change Tank Labels.2. Select the type of tank you want to label.3. Select Choose Names.4. Select a tank.3. Select the location of the tank: Port (P), Center (C), Starboard (S), fore(f), or aft (a).4. Select the label you want to use for the tank.Setting AlarmsYou can set the unit to sound an audible alarm when certain conditions are met.By default, all alarms are turned off.To set an alarm:1. From the Home screen, select Configure > alarms.2. Select an alarm category.3. Select an alarm.4. Select On to turn on the alarm.5. Specify alarm information.Setting navigation AlarmsTo set a navigation alarm from the Home screen, select Configure >alarms > Navigation.arrival—set an alarm to sound when you are within a specified distance ortime from a turn or a destination waypoint.• Type—select whether you want arrival alarms to sound only when nearingdestinations or when nearing either turns or destinations. Select Off todisable arrival alarms.• activation—select whether the arrival alarm triggers on time to arrival ordistance to arrival.• Change Time/Change distance—if you have Activation set to Time,select Change Time to set the number of minutes before arrival that thealarm should sound. If you have Activation set to Distance, select Changedistance to set the distance before arrival that the alarm should sound. Usethe Rocker to change the time or distance.anchor drag—set an alarm to sound when you exceed a specified driftdistance.Off Course—set an alarm to sound when you are off course by a specifieddistance.Setting System AlarmsTo set a system alarm from the Home screen, select Configure > alarms> System.Clock—set an alarm using the system (GPS) clock. The unit must be on forthe clock alarm to work.battery—set an alarm to sound when the battery reaches a specified lowvoltage.gPS accuracy—set an alarm to sound when the GPS location accuracy fallsoutside the specified value.