IFD500 Series Pilot Guide
System Overview 1-5
DOCUMENTATION CONVENTION
Throughout this document, capabilities that are
applicable only to the IFD550 or IFD545 are
identified using a ‡ symbol.
NOTE
Synthetic Vision Terrain Awareness
The synthetic vision display may not match the
terrain perfectly, but the display provides a
reasonable representation of the terrain in a manner
that does not misrepresent the threat posed by the
terrain. While possibly resolution or field-of-view
limited, the display still adequately portrays the
terrain for terrain awareness.
NOTE
Synthetic Vision is Not for Terrain Avoidance
The synthetic vision display may not be used as the
principal means for terrain avoidance. Synthetic
Vision may not provide the depth/distance cues
necessary for terrain avoidance and should always
be used in conjunction with other flight and
navigation information for terrain avoidance.
IFD545
The Avidyne IFD545 differs from the IFD550 in that there is no
internal VHF transceiver. Its primary function is to conduct GPS
navigation, provided it is connected to an external navigation
source selection annunciator and a CDI/HSI indicator that is
installed in the required field of view. The IFD545 cannot be used
to execute terminal area procedures that rely on VHF navigation.
The IFD545 bezel differs physically from the IFD550 in that the
radio controls along the left side of the bezel are absent, the
navigation source selection knob is replaced by an OBS button,
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