[closewith]

> I've seen quite a few sailing yachts, but never one with the exhaust below the waterline.

To a rounding error, every luxury sailing yacht built in the last 20 years and most new designs of all classes will have underwater exhausts.

[jabl]

Merely repeating your previous statement isn't helpful. Thanks.

[closewith]

And your comment is?

The fact is that marine engine exhaust systems in good repair are not down-flooding points and certainly not on the yacht in question, where it almost certainly was below the waterline.

[jabl]

> And your comment is?

Merely expression surprise at your statement, considering my experience is so different. I have no experience of 'luxury' yachts though, just regular sailing boats. So maybe those superyachts are different?

> The fact is that marine engine exhaust systems in good repair are not down-flooding points and certainly not on the yacht in question, where it almost certainly was below the waterline.

Well I agree with that, but because, again in my experience, sailing yacht exhaust systems tend to have an S curve where the exhaust goes relatively high up. Whether the exhaust opening itself is just over or under the waterline doesn't really matter for downflooding.