Raymarine E120W, Reference Manual

Page: 63 / 294

Chapter 4: Using the Chart 47
Chapter 4: Using the Chart
4.1 Important
Safety
When using your chartplotter you should always check that a route is safe. Zoom in to
check for hazards, such as small shoals, that may not be shown on a smaller scale
chart.
Until you are familiar with interpreting the chart display, you should take every
opportunity to compare the displayed objects with visual targets, such as buoys and
coastal structures. You should practice harbour and coastal navigation during daylight
and in clear weather conditions. The simulator mode can also be used to help you gain
experience.
It is strongly recommended that before you use your chart application, that you read
and understand
Chapter 3:Working with Waypoints
.
CAUTION:
The equipment should not be used as a substitute for good navigational
practice nor for official government paper charts. Do not use the chart before
you have read this chapter.
Chart functionality
1. To access full functionality, your chart application requires position and heading
data from your boat’s Global Positioning System (GPS).
2. Your E-Series Display has a built in world map, but to use your Display as a naviga-
tion aid, you will need detailed information for the area you wish to navigate. This
information comes in the form of a chart card and is available from Navionics (see
the
Important Information section at the front of this manual for details). For full
information on installing and removing chart cards refer to
page 22.
If you have a
network of E-Series Displays, the chart card data is accessible from any Display
on the network, provided that the unit with the card is powered on. Data from
more than one chart card can be shown simultaneously.
3. For your GPS and chart to correlate accurately with your paper charts, they will
need to be using the same datum. The default datum for your display is WGS84. If
this is not suitable, you can change the setting via the Chart Setup menu (see
page 99
). When you adjust the datum of the E-Series Display, a Raymarine GPS will
automatically correlate. If you have a third party GPS, you will need to correlate this
separately.
4. For the Automatic Identification System (AIS) to function you should have a suit-
able AIS receiver connected.