The nice thing about the cat with the drogue is that the cat maintains stability with her stern to the wind. The mono might not always be so lucky. With the mono, in the really bad stuff, it could oscillate and present a quarter to the wind/wave which can lead to a knockdown.
And the experience on the crew will be much more mild in the cat.
Well, until a large breaking sea crashes thru those sliding glass doors, perhaps... :-) I just don't see how it's possible to make such a blanket statement, we'll just have to agree to disagree, as I see a whole lot of cats out there (monohulls, as well) with configurations aft that I wouldn't want to present to large breaking seas lying to a JSD...
All of this is documented pretty well on the Jordan Series Drogue website.
Those about the only examples out there of cats using a JSD, and I wish they were a bit more specific about the particular types of boats, etc... Victor Shane's DROGUE DATA BASE, to the best of my knowledge, doesn't include a single such reference, the preferred tactic among multihullers seems to be a parachute sea anchor off the bow. I can't speak from much experience on this, having sailed on a large cat for only a period of about 10 days, but that tactic would be my first inclination if caught in heavy weather in a cat... So, I'll stick with Steve Dashew's final conclusion re the JSD:
"On the other hand, many cruising catamarans, with their aft sliding doors - would be extremely vulnerable to a boarding sea from the stern - as would any modern racing or cruising yacht with an open transom."
One thing I like about some current designs are the swinging comoanionway doors vs. Hatch boards. Being able to seal off the comoanionway in a pinch is a great feature.
We'll have to agree to disagree once again, I have come to absolutely DETEST swinging companionway doors on virtually every boat I have ever run that features them... They are invariably very poorly executed, are forever snagging foul weather gear and such, and in many cases present a real danger to crew, with a great potential for causing a very serious injury...
Absolutely boggles the mind, that a major popular builder goes with something like this, what the hell are they thinking?
Obviously, they're thinking that their primary 'market' desires boats that are more like houses, than boats... Or, 'sailboats' that are more like powerboats... :-)
Never ceases to amaze, some of the stuff one sees on today's floating RVs. These doors were mounted on a continuous hinge, so were not removable... A grisly accident, just waiting to happen...
I wonder about all of the Windows also, but I think they are significantly stronger than they seem. I also wonder about having to rebed them.
Uhhh, think again... :-) No doubt that may be the case on a boat like an Oyster, perhaps, but I think sticking these large windows in the topsides of many production boats is one of the worst trends in boatbuilding today...
A year ago, I witnessed a boat pinned against the outside of the Megadock in Charleston in a blow, her fenders literally squashed flat by the pressure to the extent that the hull was coming into contact with the dock in the vicinity of one of the picture windows (Astonishingly, placed at the point of the boat's maximum beam amidships)
The inward deflection of the hull was clearly visible, and the 'cracking/splintering' noises being produced were rather disconcerting, to say the least. The fact that this was all taking place in very close proximity to the boat's chainplates would have to give any serious sailor pause regarding the monumental stupidity of cutting such holes in the topsides of today's ordinary production boats...