DA 40 AFM
Supplement A21
GNS 530
Doc. # 6.01.01-E Rev. 0 01 Dec 2001 Page 9 - A21 - 8
NOTE
In some areas datums other than WGS-84 may be used. If
the GNS 530 is authorized for use by the appropriate
Airworthiness authority, the required geodetic datum must
be set in the GNS 530 prior to its use for navigation.
F. The accuracy of the data base information is only assured if it is used before the
end of the effectivity period. Use of out of date data base information is done
entirely at the user´s own risk.
3. EMERGENCY PROCEDURES
A. If GNS 530 navigation information is not available or invalid, utilize remaining
operational navigation equipment as required.
B. If 'RAIM POSITION WARNING' message is displayed the system will flag and no
longer provide GPS based navigational guidance. The crew should revert to the
GNS 530 VOR/ILS receiver or an alternate means of navigation other than the
GNS 530’s GPS Receiver.
C. If 'RAIM IS NOT AVAILABLE' message is displayed in the en route, terminal, or
initial approach phase of flight, continue to navigate using the GPS equipment or
revert to an alternate means of navigation other than the GNS 530’s GPS
receiver appropriate to the route and phase of flight. When continuing to use
GPS navigation, position must be verified every 15 minutes using the GNS 530’s
VOR/ILS receiver or another IFR-approved navigation system.
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