4
RC435 and RC435i Chartplotters
4. The appropriate database list (for example, Route or Waypoint) is dis-
played.
As with dedicated keys, when the action is invoked, a single audio beep
confirms the action. If the selection is not valid, three rapid beeps indicate
invalid action. Key beeps can be deactivated as part of the set up
parameters (see
Chapter 4
).
Pop-Up Menus
Pop-up menus usually provide various options. When a pop-up menu is
on-screen, a set of associated functions is also displayed.
Use the trackpad to select an option from the menu, then use the
appropriate function to set the option. For example, the radius of the
waypoint arrival alarm can be specified or the selected navigation data
can be set on/off.
Database Lists
Waypoints and routes created on the chartplotter are stored in database
lists. These lists can be viewed and items selected for editing.
As with pop-up menus, when a database list is on-screen, a set of
associated soft keys is also displayed; use the trackpad to select an item
from the list, then use the appropriate function to edit the item. For
example, a Waypoint or a Route can be erased.
1.2 Satellite Differential System
The RC435/435i GPS Antenna utilizes a satellite differential correction
system to improve the accuracy and integrity of the basic GPS signals.
Three separate compatible systems currently exist or are in development:
1. Wide Area Augmentation System (WAAS). Developed by the Fed-
eral Aviation Administration (FAA) in the USA.
2. European Geostationary Navigation Overlay System (EGNOS).
This system is being developed by a European consortium.
3. The MTSAT Satellite-Based Augmentation System (MSAS). Being
developed by the Japan Civil Aviation Bureau (JCAB) for civil avia-
tion use.
The area covered by the WAAS system includes the entire United States
of America but also extends to a much wider area as detailed below.
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