Hi, I was planning a IFR flight from LOWS to LOWI. In preparing the plan, I left the ALTITUDE field blank as recommended here: SimBrief - Dispatch
Altitude The desired cruising altitude, in feet. Leave this blank to let SimBrief choose one automatically. When setting a custom cruising altitude, make sure to keep your aircraft’s weight in mind. Most aircraft can only reach higher altitudes if they are light enough, and SimBrief will not prevent you from choosing an altitude that is too high for the planned weight. In most cases it is safer and easier to leave this blank and let SimBrief choose an altitude for you.
Why is the exported plan (attached) CRZ FL FL050 when according to the valid AIRAC and SID charts for VERDA1Y departure the minimum altitude for point VERDA is 10000ft?
The maximum flight altitude for the selected aircraft type Cirrus SR22 is 25000ft.
Can you recommend the correct procedure to create a proper flight plan, or fix the error? Thank you
LOWSLOWI_PDF_1744269898.pdf (476.9 KB)
I am guessing you were using a small, general aviation single-engine piston aircraft perhaps? 8000ft is not a typical altitude for those (Simbrief will usually plan 6000 to 7000 feet for such aircraft), so if you want to fly higher you would have to specify it manually.
Edit: oh I see you shared the PDF, and indeed, an SR22 Turbo is a single piston.
Simbrief also does not account for SID/STAR altitude restrictions for the time being; apparently the work required to make it do so is non-trivial.
It should be noted that Simbrief is originally optimized for airliners, and while it does support smaller aircraft, here are some quirks to be expected when using said smaller and/or unpressurized aircraft.
Regards,
Tim
Edit: also, just for kicks, I checked the minimum altitude to pass CFMU validation on the LOWS VERDA DCT NANIT LOWI route, and it appears to be 15,000 feet (it’s a requirement of the NANIT STAR into LOWI).
In real life, you would not be able to legally fly this route in an SR22 without an oxygen supply for both yourself and your passengers (according to this, “EASA rules allow you to fly up to 12,000 feet for 30 minutes without one; passengers are considered OK up to 13,000 for any length of time”).
Edit #2: you can fly from LOWS to LOWI at 10,000 feet via Rattenberg (RTT) instead; that route is better suited to your airframe. The RTT1B arrival has you 13,000 or above at RTT (because you need to be at/above 13,000 on the other end of the STAR at ELMEM); however, you can fly an approach procedure directly from RTT at 9,500 feet instead.
Thank you very much for the quick response.
Then this mention (about single-engine aircraft) could be in the Optional Entries guide.
The maximum flight altitude for the selected aircraft type Cirrus SR22 is 25000ft.
M.S.
št 10. 4. 2025 o 11:01 Rodeo314 via Navigraph <notifications@navigraph1.discoursemail.com> napísal(a):
I understand this limitation, but the Cirrus SR22T has an Oxygen system.
Just don’t forget to use it 
And you’ll have to specify your cruise altitude manually to work around Simbrief’s limitations; also, see my second edit about the alternative route-- even with oxygen, it might be more comfortable to fly at or around 10,000 so you don’t spend your whole flight climbing then descending.
Regards,
Tim
Yes I agree, your suggestion from EDIT2 seems like a good solution. I’m the type of SIM pilot who doesn’t really like to deal with these planning issues. I work by clicking on the simbrief and flying according to plan. For an airliner SIM pilot it’s great, but I see that for these smaller aircraft I’ll have to pay more attention to planning. Anyway, thank you very much for the explanation about the Simebrief option for smaller single-engine aircraft.
