Raymarine GPM400, Reference Manual

Page: 48 / 111

G-Series Reference Manual 48
Chart scale
Use the Range key to change the scale of your chart view. When
you zoom in, you see a smaller area of the chart in more detail
(larger scale). When you zoom out, you see a greater area of the
chart in less detail (smaller scale).
The level of cartographic detail available at different scales varies:
some charts provide detail at smaller scales than others.
If you select a chart scale that does not provide cartographic detail
for your chosen area, the chart will use the most detailed level
available for the surrounding area and stretch it to fit the selected
scale. This means that you will never have blank or hatched areas
on your screen. However, there could be some misalignment of
objects which cross the chart boundary in this area.
Alarms
With the appropriate equipment installed and powered up, the fol-
lowing alarms may be triggered in the chart application:
• System (anchor, timer, alarm clock and temperature)
• Navigation (arrival and off-track)
• Radar (guard zones)
• Fishfinder
• AIS
• Weather
Nav. Marks ON
OFF
Nav. Marks Symbols
The set of symbology used for navigation
marks. Corresponds to paper charts.
International
US
Light Sectors
The sector of light cast by a fixed beacon.
ON
OFF
Caution & Routing Data ON
OFF
Marine Features
Cables, nature of seabed points, tide station,
current stations and port information.
ON
OFF
Land Features
The cartographic features that are displayed
on the land.
ON
OFF
Colored Seabed Areas
In available areas (e.g. Portugal) this gives
greater definition of seabed.
ON
OFF
Background Color
The color of background water when there is
no Navionics cartography. White
Blue
Business Services
The symbols indicating the location of a
business
ON
OFF
Aerial Photo Overlay
The area displaying the aerial photo overlay
On Land and Sea
On Land
FUNCTION OPTIONS
Roads
Major coastal roads
ON
OFF
Additional Wrecks
Extended wrecks data for new wrecks
ON
OFF
FUNCTION OPTIONS