Garmin GPS 150 Pilot's Manual page 19

The GPS 150 displays all navigation data on pages accessed using the N key.
The GPS 150 contains four NAV pages:
The Position page displays current position and altitude information and also
provides reference waypoint information.
The CDI page indicates the speed, steering and distance information.
NAV Menus 1 and 2 contain prompts to perform various planning functions and
in-flight calculations. The entire list of functions the NAV menus perform appears
later in this section.
The NAV pages may be accessed by pressing N and rotating the outer knob (O).
CDI page
NAV Menu 2
Position page
NAV Menu 1
REFERENCE
NAV key overview
When using the GPS 150, you may rotate the
outer knob either direction to display other
information or pages.
The pages are accessed in a cyclic manner,
and can be displayed in different ways.
For example, instead of rotating the outer
knob to display subsequent pages, you may
repeatedly press N. This will also display the
other three NAV pages.
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