Garmin GPSMAP 8530 Black Box Owner's Manual - Page 29

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. Time: Sets the time format, time zone, and daylight saving time. Navigation Settings NOTE: Some settings and options require additional charts or hardware. Select Settings > Preferences > Navigation. Route Labels: Sets the type of labels shown with route turns on the map. Turn Transition: Adjusts how the chartplotter transitions to the next turn or leg or the route. You can set the transition to be based on time or distance before the turn. You can increase the time or distance 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. Auto Guidance: Sets the measurements for the Safe Depth, Safe Height, and Shoreline Distance, when you are using some premium maps. 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. NOTE: Auto Guidance is available with premium charts, in some areas. You can set the parameters the chartplotter uses when calculating an Auto Guidance line. Safe Depth: Sets the minimum depth (chart depth datum) the chartplotter uses when calculating an Auto Guidance line. Safe Height: Sets the minimum height (chart height datum) of a bridge that your boat can safely travel under. Shoreline Distance: Sets how close to the shore you want the Auto Guidance line to be placed. The Auto Guidance line may move if you change this setting while navigating. The available values for this setting are relative, not absolute. To ensure that the Auto Guidance line is placed the appropriate distance from shore, you can assess the placement of the Auto Guidance line using one or more familiar destinations that require navigation through a narrow waterway (page 23). Adjusting the Distance from Shore CAUTION The Auto Guidance feature is based on electronic chart information. That data does not ensure obstacle and bottom clearance. Carefully compare the course to all visual sightings, and avoid any land, shallow water, or other obstacles that may be in your path. NOTE: Auto Guidance is available with premium charts, in some areas. The Shoreline Distance setting indicates how close to the shore you want the Auto Guidance line to be placed. The Auto Guidance line may move if you change this setting while navigating. The available values for the Shoreline Distance setting are relative, not absolute. To ensure the Auto Guidance line is placed the appropriate distance from shore, you can assess the placement of the Auto Guidance line using one or more familiar destinations that require navigation through a narrow waterway. 1 Dock your vessel or drop the anchor. 2 Select Settings > Preferences > Navigation > Auto Guidance > Shoreline Distance > Normal. 3 Select a destination that you have navigated to previously. 4 Select Navigate To > Guide To. 5 Review the placement of the Auto Guidance line, and determine whether the line safely avoids known obstacles and the turns enable efficient travel. 6 Select an option: • If the placement of the Auto Guidance line is satisfactory, select Menu > Navigation Options > Stop Navigation, and proceed to step 10. • If the Auto Guidance line is too close to known obstacles, select Settings > Preferences > Navigation > Auto Guidance > Shoreline Distance > Far. • If the turns in the Auto Guidance line are too wide, select Settings > Preferences > Navigation > Auto Guidance > Shoreline Distance > Near. 7 If you selected Near or Far in step 6, review the placement of the Auto Guidance line, and determine whether the line safely avoids known obstacles and the turns enable efficient travel. Auto Guidance maintains a wide clearance from obstacles in open water, even if you set the Shoreline Distance setting to Near or Nearest. As a result, the chartplotter may not reposition the Auto Guidance line, unless the destination selected requires navigation through a narrow waterway. 8 Select an option: • If the placement of the Auto Guidance line is satisfactory, select Menu > Stop Navigation, and proceed to step 10. • If the Auto Guidance line is too close to known obstacles, select Settings > Navigation > Auto Guidance > Shoreline Distance > Farthest. • If the turns in the Auto Guidance line are too wide, select Settings > Navigation > Auto Guidance > Shoreline Distance > Nearest. 9 If you selected Nearest or Farthest in step 8, review the placement of the Auto Guidance line, and determine whether the line safely avoids known obstacles and the turns enable efficient travel. Auto Guidance maintains a wide clearance from obstacles in open water, even if you set the Shoreline Distance setting to Near or Nearest. As a result, the chartplotter may not reposition the Auto Guidance line, unless the destination selected requires navigation through a narrow waterway. 10Repeat steps 3 through 9 at least once more, using a different destination each time, until you are familiar with the functionality of the Shoreline Distance setting. Communications Settings NMEA 0183 Settings Select Settings > Communications > NMEA 0183 Setup. Port Type: See page 24. Output Sentences: See page 24. Posn Precision: Adjusts the number of digits to the right of the decimal point for transmission of NMEA output. XTE Precision: Adjusts the number of digits to the right of the decimal point for NMEA crosstalk error output. Device Configuration 23