Lowrance HDS-7 Carbon Operators Manual EN - Page 52

Extension lines Sets the lengths of the heading and course extension lines for your vessel. For setting extension line lengths on other vessels shown as AIS targets, refer to AIS "Course extension lines" on page 151 lines. A: Heading B: Course Over Ground (COG) The lengths of the extension lines are either set as a fixed distance, or to indicate the distance the vessel moves in the selected time period. If no options are turned on for the vessel then no extension lines are shown for your vessel. Your vessel heading is based on information from the active heading sensor and the COG is based on information from the active GPS sensor. SonarChart Live tide correction When selected, the tide correction feature uses information from nearby tide stations (if available) to adjust the depth values used by SonarChart Live as the sonar is recorded. Synchronize 2D/3D chart Links the position shown on one chart with the position shown on the other chart when a 2D and a 3D chart are shown side by side. Pop-up information Selects whether basic information for chart items is displayed when you select the item. Grid lines Turns on/off viewing of longitude and latitude grid lines on the chart. Hide chart If the option is set to ON when viewing a Lowrance chart, the chart (background) is not displayed and only the vessel, extensions, waypoints, and routes are displayed on a white background. 52 Charts | HDS Carbon Operator Manual