Excuse me but I could not help but chuckle when I read the assertion that all new decks are built to CAP 437. My experience is that the first time anyone gets to look over 437 is when it's being towed out to the field and the oil company rep is scratching his head wondering how the vent stack ended up in the 210 sector. And that's in Europe - You should take a look at what goes on elsewhere - and no HLL either. When I see pictures of some of the GoM decks I wonder if we are on the same planet.
G.