Chapter 4: The chart application 514.10 Chart presentationThe chart has a number of content layers and display modes provid-ing different kinds of display and information.Chart layersYou can overlay data onto a chart window to give greater depth ofinformation. The overlays available are:• AIS Objects• Range Rings• 3D locator• Heading vector• COG vector• Tide and wind arrowsTo switch layers on or off1. Press the PRESENTATION softkey.2. Press CHART LAYERS AND DATA softkey.3. Press CHART LAYERS.4. Use the TRACKPAD to select the appropriate layer and turn it onor off as required.5. Press OK to save your settings.Vectors and arrowsThe vectors and arrows are a chart presentation layer. They presentsystem data with relation to your vessel on the chart. This can assistin monitoring your boat’s course.Note: The vectors require appropriate data (e.g. wind data from awind instrument, SOG & COG calculated from the GPS fix).To switch vectors on or off1. Press the PRESENTATION softkey.2. Press CHART LAYERS AND DATA softkey.3. Press CHART LAYERS.4. Use the TRACKPAD to select the appropriate layer and turn it onor off as required.5. Press OK to save your settings.Heading vector(HDG)Course over ground(COG)Tide arrowWind arrow81314-1_A Series Reference Guide.book Page 51 Thursday, August 28, 2008 9:23 AM
