Can somebody explain when a pilot needs a VMC Descent (Doc 4444, 12.3.3.2, t)? A few examples will greatly clarify it.
In a procedural environment it is very useful when you've run out of options and you have an aircraft who is ahead of and above another one eg aircraft at 5DME FL80 and another at 35DME FL70. If you have no deemed seperations the only option is to make the higher one wait or offer them a VMC descent to become number one (as long as the other one agrees). It can also save time when using departure seperations enabling an outbound to climb before they are procedurally separated from inbound or holding traffic.