Superfast is smokin', but not in a good way

zagmund

I've noticed recently that the new Stena Superfast vessel operating from Dublin consistently is smoking as it leaves port. It looks like something you would have seen 20 years ago before emissions controls came in everywhere.

I was looking at other vessels leaving port in the last few days and they don't seem to be as bad. The Ulysses had nothing visible (from shore) as it left this morning.

I don't claim to be an expert and I know that no visible smoke isn't necessarily a good indicator for having no polluting emissions, but it's probably fair to say that visible emissions are generally a bad sign. Does anyone know what the story is with Superfast X - why it smokes so noticeably and others don't?

z

Tabnabs

I'm no engineer and so can offer no plausible reasons, but it is interesting to see that this is a common feature of this ship

https://www.google.ie/search?q=superfast+x&biw=1366&bih=611&source=lnms&tbm=isch&sa=X&ei=WbwrVbDcKey07gaixYCIBw&ved=0CAYQ_AUoAQ

Atlantic Dawn

Could it be some new kind of filtration like on diesel cars where if you are not going any great distance and then put the foot down the clogged emissions are released?