I think another issue is "how many divers do you have"? The cat offers two platforms which allows people to suit up, etc. at two different stations. We had a '50 monohull with 8 divers a few years back and it took forever to get everyone in the water. Some of the first divers in the water had to float around for ten minutes or so while everyone else got ready. And of course, everyone still on the boat is "yelling shark" and pointing to imaginary fins on the water. In the end, both the monohull and cat provide excellent shade for a pesky barracuda to circle around midday in the shadows under the anchored/moored boat. This makes for the return "climb up the ladder" process to be timed on when the barracuda is circling the far end of the boat.