Garmin GPSMAP 820 Owner's Manual - Page 33

Setting Up the Wireless Network The chartplotters can create a Wi‑Fi network to which you can connect wireless devices. The first time you access the wireless network settings, you are prompted to set up the network. 1 Select Settings > Communications. 2 If necessary, select Wireless Devices. 3 Select Wi-Fi® Network > Wi-Fi® > On > OK 4 If necessary, enter a name for this wireless network. 5 Enter a password. You will need this password to access the wireless network from a wireless device. The password is case-sensitive. Connecting a Wireless Device to the Chartplotter Before you can connect a wireless device to the chartplotter wireless network, you must configure the chartplotter wireless network (Setting Up the Wireless Network). You can connect up to five wireless devices to the chartplotter to share data. For example, you can connect an iOS® device to the chartplotter to share BlueChart Mobile data. 1 From the iOS device, select Settings > Wi-Fi. 2 Select the wireless network name you entered for the chartplotter network (Setting Up the Wireless Network). 3 Enter the password you entered when you set up the chartplotter as a wireless network. Changing the Wireless Channel You can change the wireless channel if you have trouble finding or connecting to a device, or if you experience interference. 1 Select Settings > Communications > Wireless Devices > Advanced > Wi-Fi® Channel. 2 Enter a new channel. You do not need to change the wireless channel in any devices connected to this network. Setting Alarms Navigation Alarms Select Settings > Alarms > Navigation. Arrival: Sets an alarm to sound when you are within a specified distance or time from a turn or a destination. Anchor Drag: Sets an alarm to sound when you exceed a specified drift distance while anchored. Off Course: Sets an alarm to sound when you are off course by a specified distance. System Alarms Alarm Clock: Sets an alarm clock. Device Voltage: Sets an alarm to sound when the battery reaches a specified low voltage. GPS Accuracy: Sets an alarm to sound when the GPS location accuracy falls outside the user-defined value. Setting the Fuel Alarm Before you can set a fuel level alarm, a compatible fuel flow sensor must be connected to the NMEA 2000 network. You can set an alarm to sound when the total amount of remaining onboard fuel reaches the level you specify. 1 Select Settings > Alarms > Fuel > Fuel Alarm > On. 2 Enter the remaining amount of fuel that triggers the alarm. Setting Weather Alarms Before you can set weather alarms, you must have a compatible chartplotter connected to a weather device, such as a GXM™ device, and have a valid weather subscription. 1 Select Settings > Alarms > Weather. 2 Turn on alarms for specific weather events. Units Settings Select Settings > Units. System Units: Sets the unit format for the device. Variance: Sets the magnetic declination, the angle between magnetic north and true north, for your present location. North Reference: Sets the direction references used in calculating heading information. True sets geographic north as the north reference. Grid sets grid north as the north reference (000º). Magnetic sets the magnetic north as the north reference. Position Format: Sets the position format in which a given location reading appears. Do not change this setting unless you are using a map or chart that specifies a different position format. Map Datum: Sets the coordinate system on which the map is structured. Do not change this setting unless you are using a map or chart that specifies a different map datum. Pressure Ref. Time: Sets the reference time used to calculate the barometer trend. The trend is indicated in the barometer field. Time Format: Sets a 12-hour, 24-hour, or UTC time format. Time Zone: Sets the time zone, or allows automatic selection based on GPS location. Navigation Settings NOTE: Some settings and options require additional charts or hardware. Select Settings > Navigation. Route Labels: Sets the type of labels shown with route turns on the map. Auto Guidance: Sets the measurements for the Safe Depth, Safe Height, and Shoreline Distance, when you are using some premium maps. Turn Transition Activ. : Sets the turn transition to be calculated based on time or distance. Turn Transition Time: Sets how many minutes before the turn that you transition to it as the next leg, when Time is selected for the Turn Transition Activ. . You can raise this value to help improve the accuracy of the autopilot when navigating a route or an Auto Guidance line with many frequent turns or at higher speeds. For straighter routes or slower speeds, lowering this value can improve autopilot accuracy. Turn Transition Dist. : Sets how far before the turn that you transition to it as the next leg, when Distance is selected for the Turn Transition Activ. . You can raise this value to help improve the accuracy of the autopilot when navigating a route or an Auto Guidance line with many frequent turns or at higher speeds. For straighter routes or slower speeds, lowering this value can improve autopilot accuracy. Route Start: Selects a starting point for route navigation. Auto Guidance Line Configurations CAUTION The Safe Depth and Safe Height settings influence how the chartplotter calculates an Auto Guidance line. If an area has an unknown water depth or an unknown obstacle height, the Auto Guidance line is not calculated in that area. If an area at the beginning or the end of an Auto Guidance line is shallower than the safe water depth or lower than the safe obstacle height, the Auto Guidance line is not calculated in that area. On the chart, the course through those areas appears as a gray line. When your boat enters one of those areas, a warning message appears. Device Configuration 27