No, if you say xx miles from present position, it would be almost impossible as the FMC is moving as fast as the a/c ie 7 miles a minute. The easist way for 'non-standard' descents for all pilots is for the height constraints to be fully published in the AIP and all Jepp/Aerad charts. I understand that at the moment, there are several dozen such restraints known by 99% of all pilots and by ATC but are NOT officially published-WHY NOT? <img border="0" title="" alt="[Eek!]" src="eek.gif" />