If any one needs rental of portable oxygen, the Eclipse Portable Oxygen Concentrator is great. It is continious and pulse, 17lbs. It is on a cart with a telescoping handle, battery, AC for electric, DC for car.
No more green tanks !
These people will deliver to you for your cruise. No shipping too!
Nice people. Call' um their name is Red Rock Medical Supply, number is 888-757-3343. You can send them a email at firstname.lastname@example.org
They can set you up if you have a need for oxygen.
These people are oxygen angels.