Raymarine Raydata, Installation And Operating Handbook

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Chapter 3: Getting Started 19
In low light levels, you can turn on and adjust the display backlighting
and contrast, as described later in this chapter (see Section 3.6).
To turn the RayData off, press and hold the NAV (POWER) key for
three seconds. The RayData display is cleared and the key lights go off.
The RayData is now in power-saving mode.
To turn the RayData on again, press and release the NAV (POWER)
key.
3.4 The Display
The display can show one to four items of data and their associated
information at one time. Such a set is called a page. The pages are
grouped into three main chapters, each of which is accessed using one
of the three main keys (DEPTH, SPEED or NAV). In addition, there is a
Setup chapter that allows you to set the defaults for your system (see
Chapter 4).
The main types of information shown on a display page are described
below, with reference to the illustration on the previous page.
Data Value
The single-line displays, such as the example depth display, each show
the data value in digits 1” (25mm) high, so that it is easy to read from a
distance. Other displays, such as the three-line page shown in page 21,
show more lines of data with smaller characters.
If no data is available for a displayed function, dashes are displayed
instead of the value.
Text Description
A text description of the current function (such as DEPTH) is shown,
followed by the units of measurement. For example, for the Depth
function the units can be feet (FEET), metres (MTRS), or fathoms
(FATH). You can change the default units and other information, as
described in Chapter 4.
The position of the description depends on the type of display: for a
singe-line display, the text is in the top line; for a multi-line display, the
description is to the left of the data value, and the units to the right of the
value.