Selecting radials for radial interception
This is a terminology problem - and I think you're actually both right but you need to learn the terminology. Radials always radiate out from the VOR.
You should absolutely always set the needle to the heading you intend to fly in order to avoid reverse sensing.
However, if you're intending to &quot;fly inbound on the 240 radial&quot; then you're actually on the reciprocal heading of 060 - which is what should be set on your OBS. The flag should indicate &quot;TO&quot;.
If you're flying outbound on 180 then you should set 180 on the OBS and the flag should indicate &quot;FROM&quot;.