I am pretty sure that the CHAPI at EGPD is not 200' from the edge of the hover Square on 23 in fact it is more like 30-40' and the last time I made an approach to it we finished up at 20' radalt over the H.
I am not saying that we should use the exact design, which i believe was initially thought out by a north sea pilot. but something similar possably set into the deck or at the edge of the deck.
The more we have in the way of visual guidance the better....
T4