"This is not used for (RW) aeronautical navigation."

 

True John ! anyway the data on this EFB chart come from Navigraph AIRAC 1204. I'd like to see the Jeppesen plate for this specific approach RNAV 07 FZQA

 

"Sorry, with the 50ft steps I was refering to the LANDING ALT not to the CRUISE" thanks Aykut for amending your first post. I do now understand

Sorry, with the 50ft steps I was refering to the LANDING ALT not to the CRUISE.

 

I just posted the way I do it and the way the NGX is automatically setting it to the nearest value. It sometimes sets it DOWN as well if I remember correctly, I'm not sure though, as I stated before, these are just personal techniques and the way I've experienced it, but to be safe you round it up that's what others say using manuals or procedures as reference I believe.

 

The LANDING ALT and CRUISE setting on the overhead are for the pressurization system, not for the plane's navigation systems. The OP is asking how to set up altitude constraints in the FMC.

 

In this case I'm guessing that these aren't actual constraints, but rather the altitudes you should hit at those points based on a 3-degree glide slope to the runway. In that case you wouldn't enter them as constraints in the FMC, but rather use them as a reference to check whether you are on the proper glide path while you're flying your approach. I'm not sure what the proper way of doing it is, but you could probably control your glide path using VNAV PTH (set MDA in the MCP and make sure runway elevation is entered at the runway threshold waypoint), or the RNAV glide-path guidance (G/P?), or manually of course.

The LANDING ALT and CRUISE setting on the overhead are for the pressurization system, not for the plane's navigation systems. The OP is asking how to set up altitude constraints in the FMC.

 

In this case I'm guessing that these aren't actual constraints, but rather the altitudes you should hit at those points based on a 3-degree glide slope to the runway. In that case you wouldn't enter them as constraints in the FMC, but rather use them as a reference to check whether you are on the proper glide path while you're flying your approach. I'm not sure what the proper way of doing it is, but you could probably control your glide path using VNAV PTH (set MDA in the MCP and make sure runway elevation is entered at the runway threshold waypoint), or the RNAV glide-path guidance (G/P?), or manually of course.

 

Ooooooh. I'm really sorry. I thought he was talking about the pressurization, seems like I didn't pay enough attention. Once again, sorry! And thanks fr elaborating more John.

"The OP is asking how to set up altitude constraints in the FMC."

 

not in the FMC, but in the A/P altitude selection window and the associated rotating knob

 

"In this case I'm guessing that these aren't actual constraints..."

 

no doubt about that : they are altitudes constraints on the plate provided. Have a look the way they are depicted with the 2 lines over and under the altitude which means constraint i.e not above no below the mentionned altitude

Ooooooh. I'm really sorry. I thought he was talking about the pressurization, seems like I didn't pay enough attention. Once again, sorry! And thanks fr elaborating more John.

 

No need to apologise, you gave a good answer and it can be easy to miss what the question is, especially if English is not your native language.

 

"The OP is asking how to set up altitude constraints in the FMC."

 

not in the FMC, but in the A/P altitude selection window and the associated rotating knob

 

"In this case I'm guessing that these aren't actual constraints..."

 

no doubt about that : they are altitudes constraints on the plate provided. Have a look the way they are depicted with the 2 lines over and under the altitude which means constraint i.e not above no below the mentionned altitude

 

The 'plate' is a screenshot form Avliasoft's EFB right? I don't have that myself, but if I understand correctly it takes data from Navigraph's AIRAC databases and then 'reverse engineers' that into an approach plate. In other words what's shown is not an offical plate, but rather the drawing EFB has made based on the Navigraph database. It's possible that the altitudes shown are actually just provided for reference, but EFB is drawing them as constraints.