The attitude that is automatically filled in do I need to adjust them or just let them stay at the default attitude given
You don’t need to adjust them if you don’t want to.
I think they are given correct…you can change them but I’m not sure if you should or not…i might have changed a few by few hundred feet but not more than than
In this scenario, it would be helpful to utilize the chart of the approach and arrival that you are using. This is because in infinite flight, the altitude in your flight plan are altitudes that are listed in the charts. The thing that can be confusing, is that some of the altitudes are minimums, maximums, or required altitudes. Knowing the type of altitude on the chart could help you plan your flight where the descent is a bit more smooth.
My habits before each flight is to observe these given altitudes and delete ones that would spell disaster (based on my speed while descending, too close) or ones I certainly won’t need happening during approach.
Also, deleting ones in a departure as I do high powered climbs and would like to switch on VNAV as soon as possible (VNAV won’t switch on if a SID says 8000’ or 23000’ while my A/P ALT says 37000’) in my case.
I always thought that those altitudes are waypoint-specific anyway rather than procedure-specific, not specifically tied to SIDs and STARs, can anyone agree or disagree with this thought? Because my guess is that those altitudes showing on a STAR was probably meant for its SID passing through the same waypoint, for example (maybe?), as I’ve come across weird altitude sequences on STARs such as: 3000’ → 2000’ → 5000’ → 1000’ that completely mucked up my approach as my VNAV switches off at that 5000’ mark, while I’m supposed to be at 1000’ already. Has anyone else seen or experienced this?
Thanks on the help guys! Appreciate it
I guess we are in the same boat! I make the same thing as you, remove unnecessary altitude points!
Hiya! That’s why it’s always good to check the altitudes before you depart! Or while you’re still far enough away.
I usually use the IFR charts, which give more guidance when using SIDS, STARS and approaches. They come with speed restrictions, and altitudes! Try it!
I’ve seen a couple of odd lower - higher - lower altitude sequences… I usually modify one altitude to smooth out the overall vnav.
In general, I’ve seen that the preloaded altitudes match up well to STAR and APPR plate listings, so i let them stand since i prefer APPR/Autoland usage on my longer flights.
I agree with looking up the plates to understand whether the presets are minimums, holds, or maximums. Makes the overall vnav run more understandable. (VNKT runway 02 anyone?)
Edit: i looked back and saw you had an R (RNAV) approach selected. In that case the altitudes are derived from the approach plate and are the vertical plan you are supposed to follow on your approach unless overridden by ATC.
Edit 2: i realized @Drummer said pretty much exactly the same thing already. Oops. He’s right. : )