Lowrance HDS-7 Gen2 Touch Operation Manual - Page 29
Chart Settings
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Chart Settings 3D boat selection You can select different boat icons that will be used as the current position symbol when the chart is in 3D mode. Range Rings You can turn on/off range rings from the chart settings menu. The range rings can be used to show the distance from your vessel to other chart objects. The range scale is set automatically by the system to suit the chart scale. Heading and Course extension The length of the extension lines are either set as a fixed distance, or to indicate the distance the vessel will move in the selected time period. Vessel heading extension is aligned with direction the vessel's bow is pointing. COG extension points the direction the vessel is moving. If there is no heading sensor, heading will default to the COG value. COG Heading For other vessels COG data is included in the message received from the AIS system. Chart | Lowrance HDS Gen2 Touch | 27