Cruise ships have huge power demands, and to power on board facilities such as lights and water treatment plants, they run their engines 24/7 whilst moored up in ports like Southampton in Hampshire.
Of course, it is not just cruise ships, but cargo ships as well and Southampton is not the only port in the country, I am sure the problem exists all around our coast.
I just wish shore to ship power was mandated, from my office I can currently see lots of ship exhaust being pumped into the air over Southampton 
I too live there too, the area around the docks is very heavy with fumes, it reeks. The container docks are no better, perhaps the ships might not have as much internal power demand, there is however non-stop diesel fumes from all the container lorries, going to and fro, that more than make up for it. Southampton the COPD capital of the UK, I wonder why!
I must confess that i have used yhe cruise ships for holidays that i could not have done any other way. I havent for two years now but i do know that all electric ships are in use. Hurtigruten use one in the antarctic . I know that electricity has to produced and there is not enough for all that is proposed. It is a start. The ships have become behemoths. They are monstrous now . Need to go back to to the much smaller ones and become more conscious of the harm they cause . Some are wind propelled and of limited size but just a start as it is still easier to use the engine. You do it the ideal way when you go sailing but you did have an engine too.
There will be less demand when this virus has run its course .
Yes, all the yachts are fitted with a Yanmar diesel engine 300 cc single cylinder auxillary diesel engine, not exactly a fuel guzzler. Until this year, we had been under sail everyday using perhaps 2 litres of fuel per holiday, mainly to moor up and battery charging only. I can no longer physically do that, on my own any more.
Last year will probably have been my last time. I will not be able to book until it is too late to do so because of hospital appointments and perhaps more cancer treatment (even that looks questionable because of this virus). I am no longer earning what I used to as well, they are quite expensive holidays, yachts have high maintenance costs. My only regret is that I did not learn to sail until I was 50.
Went on sailing hols on 70 ft ketch ,in Hebrides for years and got the bug . Ì started dinghy sailing in early 20's , bought an old gp14 reg 2660 at 26 when i could save enough . nhs salary was not much. Paid £120 and could not afford the launching trolley so they gave me that! Years later progressed to flying fifteen with husband . Very exciting even on inland water, sailing from Hayling Island in holidays was even more exciting. In March one year sailed in Two of Kind r weekend. Held on lake Bala , north wales. Wetsuits froze overnight. It was so cold Year later husband developed angina and would not sail again so as the Ffifteen was a handful i bought another gp 14. But it wasnt same and i lost interest about 50 so gave up at the same age that you started. ,! Dont regret lost time you probably enjoyed the time you did have more.. and you have the memories .
Sorry to reminisce so much.
That was very interesting 🙂
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