I was on celebrity infinity to alaska in september and I saw a gent on Oxy 24/7 . NO PROBLEM there R.Gilliland.
Just at the top of the page there is a section called " Find a Question" if you put "Oxygen" into the "Or by Keywords/Phrases/Surname:" Line and click "Search" you will find a load of answers to suit you. regards. .... Neil.
Most lines cater for oxygen users. Your problem will be getting insurance especially as your husband is over 75. My dad had this problem and he finally got insurance with Saga but cost him £400. (the cruise wasn't much more) good luck .
Check how much insurance will cost as over 80's are almost impossible to get insurance for and disabled octegenarians even more difficult. I had to accept a total of £750 with an excess of £1500 to cover an in-law and I could only get that from the cruise lines Own insurers as no one else would give full cover ie. they would cover but EXCLUDE the illnesses he was suffering from !!
Try Princess Cruises, they really look after disabled passengers; but it will be the insurancethat might put you off! Good Luck.
I travelled with my mum on Royal Caribbean this year for her 80th.She too has breathing problems and uses a wheelchair.Staff from embarking to disembarking could not have been more helpful.I have travelled with RCI before and there always seems to be lots of wheelchair bound and people on oxygen on board .Just give the ship plenty of warning.Also our travel agent advised us on the best cabin near to lifts etc,Have a wonderful trip!