Garmin ECHOMAP Ultra 126sv Owners Manual PDF - Page 33
Laylines Settings, Setting the Keel Offset, Sailboat Autopilot Operation
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Using the Race Timer 1 From the starting line guidance gauge, select or to set the timer. 2 Select Select to start and stop the timer. Setting the Distance between the Bow and the GPS Antenna You can enter the distance between the bow of your boat and the location of your GPS antenna. This helps ensure the bow of your boat crosses the starting line at the precise start time. 1 From the starting line guidance gauge, select Menu > Start Line > GPS Bow Offset. 2 Enter the distance. 3 Select Done. Laylines Settings To use the laylines features, you must connect a wind sensor to the chartplotter. When in sailing mode (Setting the Vessel Type, page 2), you can display laylines on the navigation chart. Laylines can be very helpful when racing. If you want to know the true water depth and the transducer is installed below the water line, measure the distance from the bottom of the transducer up to the water line. NOTE: This option is only available when you have valid depth data. 1 Measure the distance: • If the transducer is installed at the water line or anywhere above the end of the keel, measure the distance from the transducer location to the keel of the boat. Enter this value as a positive number. • If the transducer is installed at the bottom of the keel and you want to know the true depth of the water, measure the distance from the transducer to the water line. Enter this value in as a negative number. From the navigation chart, select Menu > Layers > My Vessel > Laylines > Setup. Display: Sets how the laylines and vessel appear on the chart, and sets the length of the laylines. Sailing Angle: Allows you to select how the device calculates laylines. The Actual option calculates the laylines using the measured wind angle from the wind sensor. The Manual option calculates the laylines using manually entered windward and leeward angles. Windward Angle: Allows you to set a layline based on the windward sailing angle. Leeward Angle: Allows you to set a layline based on the leeward sailing angle. Tide Correction: Corrects the laylines based on the tide. Filter Time Constant: Filters the layline data based on the time interval entered. For a smoother layline that filters out some of the changes in the boat's heading or true wind angle, enter a higher number. For laylines that display a higher sensitivity to changes in the boat's heading or true wind angle, enter a lower number. Setting the Keel Offset You can enter a keel offset to compensate the water depth reading for the transducer installation location. This allows you to view the depth of the water below the keel or the true depth of the water, depending on your needs. If you want to know the water depth below the keel or the lowest point of your boat and the transducer is installed at the water line or anywhere above the end of the keel, measure the distance from the transducer location to the keel of the boat. 2 Select Settings > My Vessel > Keel Offset. 3 Select if the transducer is installed at the water line, or select if the transducer is installed at the bottom of the keel. 4 Enter the distance measured in step 1. Sailboat Autopilot Operation CAUTION When engaged, the autopilot controls only the rudder. You and your crew remain responsible for the sails while the autopilot is engaged. In addition to heading hold, you can use the autopilot to maintain a wind hold. You can also use the autopilot to control the rudder while tacking and gybing. Wind Hold You can set the autopilot to maintain a specific bearing relative to the current wind angle. Your device must be connected to a NMEA 2000 or NMEA® 0183 compatible wind sensor to perform a wind hold or a wind-based tack or gybe. Setting the Wind Hold Type Before you can enable the wind hold type, you must connect a NMEA 2000 or NMEA 0183 wind sensor to the autopilot. For advanced autopilot configuration, see the installation instructions included with your autopilot. 1 From the autopilot screen, select Menu > Autopilot Setup > Wind Hold Type. 2 Select Apparent or True. Engaging Wind Hold Before you can enable the wind hold type, you must connect a NMEA 2000 or NMEA 0183 wind sensor to the autopilot. Sailing Features 27