Raymarine Raychart Chartplotter RC530 PLUS, RL80CRC PLUS manual Changing the Chart Scale

Chapter 2: Getting Started & Adjusting the Display 2-21

the radar and chart images. It is recommended that you set the radar to True motion to ensure the radar and chart images remain synchronised when the vessel moves. When you press FIND SHIP the following occur:

•The chart is redrawn so that its center position matches that of the radar dis- play.

•The radar is redrawn to the scale and heading mode of the chart.

Note: Depending on the topology of the coastline, the radar returns may not relate to the charted shoreline, the radar image will therefore be different to the chart display. For example, a gently sloping beach with a cliff several hun- dred metres beyond the charted coastline, the cliff is not shown on the chart but will be displayed on the radar image.

Changing the Chart Scale

The RANGE key allows you to change the chart scale so that you can see a smaller or larger area on the screen.

Plotter mode is available to allow you to zoom into a smaller area, even when no chart data is available for that scale. Section 7.7 describes how to set plotter mode on/off.

You can change the chart scale for two purposes:

•To see either more detail (of a smaller area) or a larger area (in less detail) on the screen.

•To move the display to another area of the chart, by zooming out to a small scale chart, then zooming in on another position centered on the cursor.

The cartographic detail available on charts varies according to the chart scale and some areas include detail at smaller scales than others. This can cause blank areas on the display when adjacent areas with different levels of detail are displayed. To reduce this affect you can use the Chart Set Up options (see Section 7.7) to set chart display detail to simple. Then, as you zoom in, charted areas are displayed but with less detail shown.

Each time you press the RANGE key, the chart scale changes to the next available setting. The status bar indicates the distance from top to bottom of the screen, in nautical miles.

Increases the	Vertical distance
	displayed on chart
chart distance
RANGE
Decreases the	6nm	CSR	50 45'980N
		POS	001 01'490W
chart distance
		Status Bar

D4175_1

Around the Around the	Chart
Moving
Moving Chart

Figure 2-11: Changing the Chart Scale