EHSI Symbology

Remarks

Distance is displayed to next FMC

Waypoint (NM) or tuned

Navaid (DME). Below 100 NM tenths

of a NM will be displayed

Indicates number under pointer is a

heading - box indicates actual

heading. Referenced to Magnetic (M)

or true (TRU) North.

Indicates FMC computed ETA for the

active waypoint.

Compass Data is provided by the

selected IRS (360° available but

approximately 70° are displayed

Compass Data is provided by the

selected IRS.

Aeroplane

Represents the aeroplane and

Symbol (W)

indicates its position at the apex of

the triangle.

Aeroplane

Represents the aeroplane and

Symbol (W)

indicates its position at the centre of

the symbol.

Waypoint Active

Active - Represents the waypoint the

(M)

aircraft is currently navigating to.

Downpath(W)

Downpath - Represents a navigation

point making up the selected active

route.

Trend Vector

Predicts aeroplane directional trend

at the end of 30, 60 and 90 second

intervals. Based on bank angle and

ground speed. Three segments are

displayed when selected range scale

is greater than 20 NM, two on the 20

NM and one segment when on the

10 NM scale.

Active Route (M)

The active route is displayed with

Active Route

continuous lines (M) between

Mods (W)

waypoints. Active route

Inactive

modi cations are displayed with

Route (C)

short dashes (W) between

waypoints. When a change is

activated in the FMC, the short

dashes are replaced by a continuous

line. Inactive routes are displayed

with long dashes (C) between

waypoints.

Vertical Pointer

Displays vertical deviation from

(M) and

selected vertical pro le (pointer) in

Deviation Scale

MAP mode during descent only.

(W)

Scale indicates +/- 400 ft deviation.

Glide slope

Displays glide slope position and

Pointer (M) and

deviation in ILS mode.

Deviation Scale

(W)

Wind Speed and

Indicates wind speed in knots and

Direction (W)

wind direction with respect to the

map display orientation and

compass reference.

North Pointer (G)

Indicates map background is

orientated and referenced to true

north.

Altitude Pro le

MAP

Represents an FMC calculated point

Point and

and is labelled on the ight plan

Identi er(G)

path as” T/C” (top of climb), “T/D”

(top of descent), “E/D” (end of

descent) and “S/C” (step climb).

Weather Radar

EXP

Multicoloured returns are presented

Returns

VOR/ILS,

when either “WXR ON” switch is

Mapping Radar

MAP

pushed. Most intense regions are

Returns

displayed in Red, lesser Amber

lowest intensity Green. Areas of

(both G,A,R,M)

turbulence are displayed in magenta

Range Arcs (W)

EXP VOR,

Range Arcs are displayed in the

EXP ILS,

expanded rose VOR/ILS modes when

MAP

the Weather Radar Switch is ON.

Range arcs are displayed in the MAP

mode with or without the WXR

Switch ON.

Selected Heading

ALL

Indicates the heading selected on

Bug (M)

the MCP. A dashed line extends from

the marker to the aeroplane symbol

and

(except for PLAN mode) for ease in

tracking the marker when it is out of

Reference Line

view.

ADF Bearing

ALL

Indicates relative bearing to tuned

Pointers

ADF station as received from the

respective ADF radio.

VOR / ILS

VOR, ILS

Displays frequency of manually

Frequency

tuned navaid. The word ‘AUTO’ is

Display (G)

displayed in place of the frequency

if the VHF Nav radio is in the auto

tune

mode

Dri Angle

FULL

Indicates aeroplane’s present track.

Pointer (W)

VOR/ILS

Replaces track line when a Full Rose

mode is selected.

Altitude Range

MAP

The intersection of the arc with the

Arc (G)

track line is the predicted point

where the MCP altitude will be

reached. The prediction is based on

present ground speed and

aeroplane vertical speed.

Position

MAP

NUMBERS - Indicate the Position

Di erence

Di erence in NM between the

Display (W)

FMC’s present position and the L

IRS and R IRS present positions

respectively.

ARROWS - Rotate through 360° to

indicate the relative bearing to the

associated IRS present position.

L or R - Indicates which IRS present

position the displayed Position

Di erence corresponds to.

Displayed when the Position

Di erence of the L IRS and/or R IRS

exceeds the Position Di erence

limits detected by the FMC or EFIS

Symbol generator.

Present Track

EXP VOR,

Displays present ground track based

Line (W) and

EXP ILS,

on aeroplane heading and wind.

Range Scale (W)

MAP

Range numeric values are one-half

the actual selected range. With

heading-up orientation, the track

line will be rotated left or right at an

angle equal to the drift angle.

Lateral Deviation

Indicator Bar

(M) and

1° Normal Scale

Deviation Scale

1/2° Expanded Scale

(W)

5°

Selected Course

Pointer (W) and

Line (M)

Selected Course

Pointer (W)

To / From

Pointer (W)

To/From

Annunciation

(W)

O -route

Waypoint (C)

Airport and

MAP, PLAN

Available when the EHSI display

Runway (W)

range is 10, 20, or 40 NM.

Displayed if the airport has been

selected as the origin or

destination airport with a speci c

runway selected.

Runway symbol is scaled to

represent the length of the

selected runway.

The dashed centre lines extend

outward 14.2 NM from the

runway thresholds.

Vertical Pro le

MAP, PLAN

Represents an FMC computed

Points (G)

vertical pro le point in the active

ight plan as T/C (top-of-climb), T/D

Identi ers (G)

(top-of-descent), S/C (step-climb),

and E/D (end-of-descent).

A deceleration segment point has

no identi er.

VOR (C, G)

MAP, PLAN

NAV AID switch - OFF

Tuned Navaids (excluding NDBs) are

DME/TACAN

displayed in green.

(C, G)

NAV AID switch - ON

All appropriate navaids in the FMC

VORTAC (C, G)

database and within the MAP area

are displayed when the range is 10,

20, or 40 NM. Only high altitude

navaids are displayed when selected

range is 80, 160, or 320 NM.

Nav aids not being used are

displayed in Cyan (blue)

Manually Tuned

MAP, PLAN

When a VOR navaid is manually

VOR Radials (G)

tuned, the associated MCP selected

course and its reciprocal are

displayed.

VOR Radials (G)

MAP

The VOR/ADF switch on the EFIS

control panel must be ON and a

valid VOR signal must be received.

The VOR/ADF switch on the EFIS

control panel must be ON and a valid

ADF signal must be received.

Displays relative bearing to the tuned

ADF station(s).