Sign in to follow this  
planenut

Departure Procedure Question

Recommended Posts

Planned a flight from PAJN to PANC.  DP was the ASORT2 which I used the GTN to load.  The first magenta waypoint was an altitude (430 ft).  It also showed up on the PFD as DTK 265 430' 1NM.

 

My question is what does that 430' mean to me?  If I remove that 430' from the DP, then the next waypoint is indicated in magenta and the plane will fly to it.

 

The DP I pulled up on Sky Vector doesn't show the 430'.  It just says do a climbing left turn heading 252° to CGL.  CGL is my first WP in the GTN

 

Just don't see how that 430" figures into the equation.

 

Hope someone can splain it to me.  Thanks.

 

Jim

Share this post


Link to post
Share on other sites
Help AVSIM continue to serve you!
Please donate today!

Yeah, as Michael said, it's a FLOATING WAYPOINT (or conditioned waypoint)

 

It is subject to you being at 430 feet for the turn to start. 

 

I didn't check the charts, but let me guess that airport elevation is 30 feet? Am I right?

Share this post


Link to post
Share on other sites

Hi Jaime,

 

You're close.  The airport elevation is 25'.  Juneau, Alaska.  I was using runway 26 with the dp as I posted.  If runway 8 is used it states:  Climbing right turn as soon as practical.  I just wonder where the 430' came from if not shown in the dp chart.

Anyhow,  thanks guys for the clarification.

 

Jim

Share this post


Link to post
Share on other sites

The FMC is making you start the turn at 400 feet AFE (above field elevation). 400 feet is usually the minimum altitude to start maneuvering. Naturally, you're not supposed to lift-off and immediately start the turn, note the "as soon as practical". That's where the 430' is coming from!

 

Those 5 feet difference might be either because it will round it up to the next tenth, or because the Airport Reference Point in the FMC has an altitude of 30 feet.

 

Hope it makes sense now! :)

Share this post


Link to post
Share on other sites

Got it.  Thanks for the info Jaime.  Learn something new every day.

 

Jim

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
Sign in to follow this