Raymarine a50 User Guide

Use the RANGE button to change the scale of the 
viewable area. Press ‘IN’ to see a smaller area of the 
screen in more detail (large scale). Press ’OUT’ to see 
a greater area of the chart (small scale).

The level of cartographic detail available at different scales varies 
depending upon the chart card used. Some charts provide more 
detail at smaller scales than others.
If you select a chart scale that does not provide cartographic detail 
for the chosen area, the chart will use the most detailed level avail-
able for the surrounding area and stretch it to fit the selected scale. 
This means that you will never have blank or hatched areas on the 
screen. However minor misalignment of objects may occur where 
they cross the chart boundaries.

Your display unit has two distinct color palettes, for day or night 
operation. You can also manually adjust the backlight level.

1.  Press the Power key to display the palette select softkey and 

brightness level.

2.  Press the appropriate softkey to select between Day and Night 

palettes.

Note: The display saves the current palette when the unit is 

powered off. A display set to NIGHT may be difficult to see in 
bright sunlight.

1.  Press the Power key to display the backlight level bar.
2.  Use the left / right trackpad keys to adjust the backlight level.
3.  Press OK to accept the setting and exit the backlight adjustment.

81314-1_A Series Reference Guide.book  Page 21  Thursday, August 28, 2008  9:23 AM