Defenestrator,
No worries
Chimbu,
Yeah, I can see the logic behind that.
The gradient in brackets indicates the gradient to be flown to remain in CTA.
I'd have to say MDA is an OCA? Just like DA and minimum obstacle clearance for visual circling are an OCA.
As for DH and MDA. I'd say that DH is much the same as a DA where descent below that height/altitude is allowed as long as the decision to continue/MAP is made at or before reaching that height/altitude? Whereas descent below MDA is not allowed unless meeting the appropriate criteria?