when i always make a simbrief plan the cruise altitude i write is not the final one like i can get instructed to increase so thee tod given by simbrief is for the old altitude and io would like to know how to add the new tod realsitically
If I’m ever in this situation, I calculate what my average “altitude change per NM” gradient is for my descent, and I find this method works well the vast majority of the time.
I’ll give an example:
Say my current TOD waypoint is marked at 35000ft, but I’ve climbed to 39000ft, and my “altitude change per NM” is 275ft (which is pretty typical from experience).
4000ft (difference between FL350 and FL390) / 275 = 14.5NM (I typically round up, so to 15 in this case to be on the safe side).
Then using the user-waypoint feature, I add a waypoint approximately 15NM before my TOD waypoint (this can take some trial and error) and set the altitude accordingly (in this example for FL390).
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is this the most realisitic action to match realife
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Well in real life, the aircraft’s computer would calculate the TOD point automatically, but I’d say the gradient method is a pretty realistic way of doing it manually.
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I usually calculate mine with a Top of Descent Calculator. You simply enter your current altitude, the altitude you want to descend to, and your speed, and it calculates the distance at which you should start descending.
i mean when i calculate it how to add it as a waypoint at this distance
Using the new User Waypoint feature. Just click anywhere on the map and you can add a waypoint there. It can take a bit of trial and error to get the distance right, and then just move it into the right position in the flight plan waypoint list.
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You can also drag the legs of your current flight plan on the map to add waypoints, as shown in this video.
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okay and also could i NAME THE CUSTOM WAYPOINT
This can’t be done in-app at this time, no. (that would be useful though tbf)
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OKAY and how to know the altitude change per nm like you said @BennyBoy_Alpha
Take the altitude difference between two or more waypoints, then divide that by the total distance between them.
Given that Simbrief takes into account your projected ground speed when calculating these altitudes, you don’t necessarily need to worry about that aspect.
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