Embraer EMB145 Operation Manual page 2595

For an IMC approach, the display information is the same as in the AIII
mode except:
− The guidance cue is derived from the FGS and is removed from
the display at 90 feet Radio Altitude (CAT II) or 150 feet AGL
(CAT I);
− Flight director modes are displayed;
− The IMC mode is annunciated;
− No approach monitoring or flare guidance is provided by the
HGS. However, flare cues (" + + ") are displayed to alert the
pilot.
The IMC mode may be used during any conventional Flight Director
approach that is approved for the basic airplane or the operator's
Operations Specification (e.g., a CAT I Flight Director ILS approach).
The IMC mode is an alternate approach mode primarily intended for
autopilot flight director approaches. Flight director guidance is
displayed in IMC mode as long as the flight director pitch and roll
commands are valid.
Once on the ground, the Ground Localizer Scale and Index is
displayed as in the Primary mode.
VMC MODE
The VMC mode is intended for visual approach operations. No
guidance is displayed in this mode. The VMC mode is intended to
enhance the visual approach operation by allowing the pilot to
establish and maintain the airplane on the proper glide path to the
runway without reference to a ground based landing system (ILS,
VASI, etc.). In a VMC mode approach, Flight Path is used to control
the approach to the runway visually. This is particularly beneficial
during nighttime approaches or approaches with poor visual cues.
The VMC mode provides approach symbology in the same format as
the AIII and IMC modes, however, navigation data is not displayed.
Flare and landing in the VMC mode is accomplished by using normal
visual procedures. Between 55 feet and 10 feet, the flare cue symbols
" + " are displayed above the Flight Path symbol wings.
REVISION 39
AIRPLANE
OPERATIONS
MANUAL
NAVIGATION AND
COMMUNICATION
Page
2-18-75 11
Code
01