737-800 Magenta Line

[RYR738_driver]

A question came up the other day between me and the Captain about the Magenta Line. It showed our missed approach correctly as a straight line but we were wondering does that line carry on to infinity or stop somewhere, maybe when the FMC calculates that you will run out of fuel?

Thanks
RYR_738

[BOAC]

It goes on for roughly twice as long as half its length.

[Dit]

Why don't you just create a new waypoint say 500nm from the far end of the runway, put it in the FMC as the last waypoint then have a look at where it ends. Have done this before myself and it does have a finite length. Not that I can remember what it is...

[IRRenewal]

700 nm is the number you are looking for. Use the centre fix, generate a point 704 (or 5 or whatever the distance is from the fix to the rwy), and put that in the FMC legs page after the G/A. You can then step to this point in plan mode.

Why use the centre fix? Because you cannot generate a way point based on a RWXX point in the FMC for same reason.

[None]

It goes on for roughly twice as long as half its length.

I love that!

[Brian Abraham]

BOAC, love it. Far more precise than how long is a piece of string.

[Callsign Kilo]

The missed approach track line from RW10 at DUB extends to somewhere near Prague. Just a little observation that I've made

[mona lot]

Is it true there is a pot of gold at the end of the magenta line?

[BOAC]

No - that is over the Rainboe