Originally Posted by ka4wja
Are most cruising cats so unsafe that they need "escape hatches"???
That is about the same as to ask if modern cruising monohulls are not safe enough to dispense any design consideration in what regards an ability to right itself up after an inversion. After all the cruising monohulls, specially the modern ones that are beamy and have a huge stability, are very rarely inverted. And yes, the RCD demands an AVS that will allow any certified Class A boat to be re-righted after a short time by the same sea conditions that lead to the capsize
The Cats are very rarely inverted but it can happen and it happens even if not frequently. It is known that they have a bigger buoyancy than ballasted monohulls and the chances are that they will remain afloat for a long time so it makes sense in what regards safety
to create a way to go in and out of a cat when the boat is inverted (since it has not the ability to re-right himself) while waiting for a rescue