Hi Bob, (and Richard)

This has got me stumped, a few practice questions in the back of the book are either wrong or I have just not grasped the concept.

My understanding is if the box on the DAP plate is shaded (for instance HAY RNAV-Z RWY 22) that means the circling minima has come down from 1000 to 900 feet.
Query below.

CIR REV QUESTIONS SET 8 Q9
You are conducting an RNAV GNSS at night on RWY 22 at Hay, you break out of cloud at 990feet with a vis of 2,5km. If you are now too high to land straight ahead on rwy 22 you should?

a) carry out missed app.
b) continue to circling area overfly for lh circuit rwy 22
c) continue to circling area overfly for rh circuit rwy 22
d) climb back to 100 feet and fly a left circuit rwy 22.

You answer states that you are below MDA for circling which is 1000feet and can't be sure of 300ft terrain clearance...

But i have the box shaded grey and Hay has an AWIS (as listed in ERSA).
Wouldn't that now be an MDA reduced by 100 feet to 900 feet, allowing B to be the correct answer?

Please tell me i'm not going crazy... My exams tomorrow