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Heads-Up Display Modes 35 - Metaboli

Heads-Up Display Modes 35 - Metaboli

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48 <strong>Heads</strong>-<strong>Up</strong> <strong>Display</strong> <strong>Modes</strong><br />

Required<br />

Airspeed<br />

Required Altitude<br />

Enroute Mode<br />

Selected<br />

Waypoint Steering<br />

Cue<br />

The VFHI (ENR) Submode<br />

Distance to<br />

Waypoint<br />

Backup Instruments<br />

The instrument panel also provides navigation information. The MFD symbolizes<br />

your position, the waypoint , and the desired flight path to the next selected<br />

waypoint. The ADI yellow predictor bars (“needles”) mark the desired bank and<br />

pitch angles while the HSI shows the required heading and distance to the next<br />

waypoint. In general, if the HUD becomes unserviceable, you can still navigate<br />

using the instrument panel.<br />

The VFHI (ENR) submode provides no combat information. Generally speaking,<br />

select this mode, set your course, and then select a more appropriate combat<br />

mode. Occasionally return to VFHI (ENR) mode to verify your flight path. Press<br />

the ~ key to cycle through waypoints.<br />

Reading the VFHI (ENR) Submode instrumentation<br />

In the figure above, the aircraft on approach to waypoint 2 is misaligned by<br />

about <strong>35</strong>° to the left. This is reflected on the HSI (see the instruments at the<br />

bottom of the figure): the current heading is 20 and the ADF arrow (the narrow<br />

needle) reads 55°. The distance to waypoint 2 is 30 km (upper-left corner of the<br />

HSI). The desired radial, the desired flight path from waypoint 1 to waypoint 2,<br />

is shown by the flight path marker (the wide needle). In other words, the ADF<br />

needle points directly to the next waypoint while the flight path marker points<br />

to the pre-programmed flight path to that same waypoint.<br />

The ADI also shows the misalignment between the aircraft’s heading and the next<br />

waypoint. The required bank needle points to the right, indicating the aircraft

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