Clearing The Map Page; Changing The Storm Data Display Range - Garmin GNC 420 Pilot's Manual Addendum

To confi gure storm data on the Map Page:
1. From the default Nav Page, turn the small right knob to select the Map Page.
2. Press MENU to display the Page Menu.
3. Turn the small right knob to select 'Setup Map?' and press ENT.
4. The fl ashing cursor highlights the GROUP fi eld. Turn the small right knob to display the Map Setup Options
Menu. Turn the small right knob to select 'Weather' and press ENT.
5. The fl ashing cursor highlights 'Weather' in the GROUP fi eld. Turn the large right knob to select the desired
lighting mode fi eld. Turn the small right knob to select the desired mode and press ENT. Repeat for the
remaining fi elds and options.
6. Return to the Map Page by pressing CLR.

Clearing the Map Page

Routinely clearing the Map Page of all discharge points is a good way to determine if a storm is
building or dissipating. In a building storm discharge points reappear faster and in larger numbers. In a
dissipating storm discharge points appear slower and in smaller numbers.
To clear the Map Page of all discharge points:
1. From the default Nav Page, turn the small right knob to select the Map Page. Press MENU to display the
Page Menu. Turn the small right knob to select 'Clear Storm Data?' and press ENT.

Changing the Storm Data Display Range

Storm data can be displayed on the 2000 nm zoom scale, but the data only goes out as far as the
STORMSCOPE can report (200 nm). The 500 nm zoom scale will display all lightning data. Scales
greater than 500 nm do not display any further STORMSCOPE data.
To select a storm data display range:
1. From the default Nav Page, turn the small right knob to select the Map Page. Press MENU to display the
Page Menu.
2. Turn the small right knob to select 'Setup Map?' and press ENT. Turn the small right knob to select the
Weather Group and press ENT. Turn the large right knob to select the desired lightning symbol option. Turn
the small right knob to select the desired range and press ENT.
Getting Started Section 2
Goodrich STORMSCOPE Interface Main Page Sequence
Only the data that is viewable on the screen is
included in the strike rate. Therefore, you can zoom
in and see what the strike rate is locally, or you can
zoom out for a bigger picture.
Also, when panning with the cursor on the Map
Page (see page 15), you can zoom in and isolate
individual cells. Please note, however, that strike
data is not typically updated on the Map Page
while the panning cursor is on. Therefore, when the
panned map is fi rst displayed, the data is only a
"snapshot" of conditions (as mentioned above, the
strike rate will refl ect viewable data only).
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