Originally Posted by
Justapax1
That means there are nearly 500 cruise ships burning heavy marine oil.
There are alternatives to burning heavy marine oil, the industry just chooses not to take them up. There is no real alternative to JET-A1.
Left as an exercise for the student:
'How many A380s flying 100 miles does it take to produce the same amount of CO2, NOx, SO2, microparticulates and soot as it does to equal the emissions of one cruise liner at dock for an hour?'
Far better to take a jet and spend longer at your destination than to burn dirty fuel getting there.
With the best will in the world no-one can expect cruise lines to simply scrap the older ships just cos they run on oil based products, just will not happen cos it would be frankly uneconomical to do so.
Most of the older ships have various "green" measures that have been retrofitted to them such as scrubbers to prevent most of the bad emissions and "magic carpet of bubbles"
https://hakaimagazine.com/news/ridin...et-of-bubbles/
Scrubbers have their issues...
https://alaskapublic.org/2024/08/29/...tion-concerns/
The most polluting cruise lines...
https://www.which.co.uk/news/article...d-aErcC4S3Z1W0