Paul Tomblin wrote:

Our club just got a 530 for one of our planes, and so before I fly it I'm
spending a lot of time with Garmin's simulator. So one of the flights I
do a lot is here (KROC) to Ottawa (CYOW) and back.

When I fly from Ottawa, I always get the OTTAWA ONE departure, which means
I put ASHTN and REEDO in my handheld GPS flight plan. But since the
manual tells me that I can select depature procedures in the 530, I
thought I could leave them off my flight plan on the 530 and have the
procedure loaded. But at least in the simulator, I have no such luck - I
can't select this departure procedure. Is this a limitation of the
simulator, or does the 530 not allow you to select departure procedures if
they're classified as "vector"?

If it is purely a vector departure; i.e., "fly xxx heading for vectors
to en route fix" then the 530 won't have those. Why should it? All you
do is fly an initial heading for vectors.