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Chapter 4 - Using the Chart Screen
Figure 3 shows the same chart, but with the chart’s viewing angle now set to leg-up and the vessel on a different course than the third leg. Notice the new direction of the north-pointing arrow.
Using chart rotation while browsing
• Course-up or Heading-up (Hdg up) - Suppose that you’re displaying the charts as course-up or heading-up and you press the cursor pad to go into browse mode. If your vessel changes course, you won’t see the chart turn to the new direction until you return to vessel mode by pressing the VESSEL key. You must be in vessel mode to see any changed course angle. This feature lets you keep a steady viewing angle if you’re browsing around on the chart.
• Leg-up - If you’re displaying charts as leg-up and the 958 switches to a new leg, you’ll see the chart rotate to the direction of that new leg even in browse mode—unless you’re actively pressing the CURSOR PAD .
NOTE:
If you’re displaying the charts as either leg-up or course-up, you may see a black line with white space on the other side. This line is the edge of the chart, which is now visible since the chart has been rotated. When the vessel or cursor crosses the line, the display will switch to a new chart.
The edges of other charts in the 958’s built-in world atlas are shown, in addition to those in your local cartridge. These edges are shown as black or red dashed lines.
The lat/lon grid is labelled only when the chart is north-up.
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How rotating affects the chart and radar
Chapter 4 - Using the Chart Screen
The rotation of the chart and the rotation of the radar image interact under certain circumstances, as described below.
Assume that the chart and radar are both north-up at the start:
If the CHART screen’s in ...
And the radar image is ...
Overlaid on the chart
Browse mode The chart can’t rotate; but if you change the CONTROL key to RADAR , the chart’s mode automatically switches to vessel (see below)
Not overlaid
The chart can’t rotate but the radar can rotate; so if you change the radar to leg-up, the chart doesn’t change (it stays north-up)
Vessel mode Chart and radar both rotate together, so if you change the radar to leg-up, the chart automatically changes to match (and vice versa)
Chart and radar both rotate but separately; so if you change the radar to leg-up, the chart doesn’t change
(and vice versa)
Setting up the chart screen
To set up the display of data on the CHART screen, press the
CHART SETUP menu key (in either vessel or browse mode)
958 Operator’s Manual, Rev. A
On the CHART SETUP/STATUS SCREEN you can set up the details on the CHART screen, turn the radar overlay on and off, and adjust the 958’s track control.
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Chapter 4 - Using the Chart Screen
Choosing the chart details
To set up the chart details, press the CHART DETAIL menu key to display the CHART DETAIL screen.
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To change any of the options, first press the CURSOR PAD to move the cursor to the desired item, then press the ON/OFF menu key to turn the item on or off (off is represented by two dashes)
Lat/lon grid
The ON setting shows lat/lon lines on the CHART screen. Turn lat/lon lines off when these lines add clutter to your screen, or when you don’t need them.
Text info
The ON setting shows the names of local cities, towns, harbors, channels, bodies of water, etc.
Waypoint names
The ON setting shows the name of each waypoint below its symbol. The OFF setting displays just the symbol itself.
958 Operator’s Manual, Rev. A
Chapter 4 - Using the Chart Screen
Chart edges
The ON setting shows the outlines of the charts that are on the installed Navionics chart cartridge or the built-in maps. Chart edges are shown as boxes with dotted lines.
Depth
The ON setting shows depth contour lines for low, mid, and deep water areas, for any or all of the three depth levels.
Track line
The ON setting shows your vessel’s track points (the course you’ve already traveled). For more track display options, see
“Changing the track control” starting on page 56.
Waypoints
The ON setting shows your waypoints on the CHART screen, and the OFF setting turns them off, with the exception of waypoints on a route.
Nav aids
The ON setting shows nav aids from the Navionics chart cartridge, and the OFF setting hides the nav aids.
Land masses
The ON setting shows the coloring of land masses to contrast between water and land. The OFF setting shows only coastline, without the coloring.
Turning the radar overlay on and off
Press the RADAR OVERLAY menu key to place a radar overlay on the CHART screen ( ON ) or remove it ( OFF ). For details about the radar overlay, see ”Overlaying radar on the chart” starting on page 128.
958 Operator’s Manual, Rev. A Page 55
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