Garmin GPS 90, Руководство пользователя и справочник

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When the GPS 90 is receiving DGPS corrections, the
‘beacon receiver’ section of the I/O setup page will display
the frequency and signal strength, as well as the distance
from the transmitter to the beacon receiver. A status mes-
sage will constantly keep you informed of DGPS activity:
• A ‘tuning’ message will be displayed while a beacon
signal is being tuned.
• Once the beacon signal has been tuned, the status
message will display a ‘receiving’ message.
• If a signal is tuned and no corrections are being
received, a ‘no data’ message will be displayed.
• If a beacon signal cannot be tuned, a ‘no status’
message will be displayed.
The last listing on the GPS 90’s setup menu is the near-
est airport function , which allows you to define the
type and minimum length of runway used to calculate the
nearest airports. The options for runway surfaces are:
• Any: (Default setting) any runway, regardless of sur-
face type, including water landing facilities.
• Hard O n l y : Only runways with a concrete, asphalt
or similar sealed surface.
• Hard or Soft: All runways except water landing.
• Water Only: Only water landing facilities.
To select a runway surface:
1. Use the arrow keypad to highlight the runway surface field.
2. Press the
E
key.
3. Use the arrow keypad to select the surface and press
E
.
The bottom of the nearest airport page allows you to
designate a minimum runway length used to determ i n e
the nine nearest airports. The default setting is 0 feet.
To enter a minimum runway length:
1. Highlight the ‘Minimum Length’ field and press
E
.
2. Enter the desired runway length and press the
E
key.
50
Setup Menu
DGPS &
Nearest Airport
Setup
Selecting a nearest
airport surface type.
Entering a minimum
runway length.
gps 90 manual 8/6/98 10:00 AM Page 50