Blank altitudes in route

Hi just a quick question, when making a said route SID then route then STAR I’ve noticed there are some blanks not filled in ?

Why are they blank ? Do they need filled in ?


Not all SIDs and STARs will have altitudes for every waypoint. Some may not even have altitudes at all. It’s best to refer to the specific chart to see what it says, since that gives you the most accurate information.


Cheers for your prompt reply.