A320 Grid MORA range

[Dragon 1]

What is the range of the Grid MORA displayed on the bottom right of the ND on the A320?
Can`t find the reference in FCOM.

[Tail-take-off]

Depends what range you have the arc mode set to.

[TyroPicard]

Dunno about the one bottom right, but the one bottom left is described at FCOM 1.31.45 p13 or thereabouts.

[Microburst2002]

I think you must have at least 40 nm range to have it displayed in your ND.

[shortfuel]

Hi,

I know at least 3 different ways Airbus displays the grid MORA on ND.
It mainly depends on your MSN / EGPWS std...

You mentioned your MORA in the bottom right-hand corner so I assume you're flying a 3500+ A320 family MSN.
In that case you can find your answer there: FCOM 1.31.45 p18a:

http://nsa19.casimages.com/img/2011/01/01/110101071855150317.jpg (http://www.casimages.com)

[Microburst2002]

That is for TERR display.

grid MORA is displayed with EFIS option CSTR and (I think) range 40 or greater

[shortfuel]

Agree, but having TERR ON is the only way to have some MORA in the bottom right-hand corner...

For CSTR only, range must be 40 NM or greater as you said and this MORA covers a circle of 40 NM around A/C FM position.

[FLEXPWR]

Too much confusion... The grid MORA is displayed indeed with a range 40 miles and above, at the bottom LEFT of the screen.
The one at the bottom right is only showing in TERR mode, and is not a grid MORA, but the highest terrain elevation displayed depending on range.

The grid MORA is an option available depending on the database used by the operator, and garantee a clearance above the highest terrain (that's what grid MORA does...) the TERR will just show you the elevation at which you will hit the mountain...:}

Flex