This is not a dumb question, Loralee. I am a CPAP user and take a 10 to 12' extension cord with me, just in case. Also, the last time I flew, I checked my machine at the airport in a reasonably sturdy travel case, but the mask itself got broken in transit. You may want to carry at least the headgear and mask in your carry on; or, pack a second mask in a location where it won't get cracked or damaged.
Loralee814- Maybe a better answer for your question is that there is typical a single outlet on the dressing table out in the cabin. It is capable of powering your machine and or a hair-dryer. If you need more that one outlet, bring a multi-outlet stip or as Going Cruisn said, an extension crod (bring one multiple outlets on the end. Not all the cruise ships have outlets with ground prong holes, so to be safe, bring a non grounded x cord OR one of those adaptors that does the 3 prongs to a 2 no-ground socket. There is typical also a "razor" charger outlet in the bathroom, but these are not rated for much more power than charging a razor (or cell phone type battery)
It is a device that has a mask that fits over the nose and provides Constant Positve Air Pressure, hence C-PAP. (Not sure that "pressure" is the right word), but some of us who got it bad, snore without it and have long periods where we stop breathing, "sleep apnea".
For me, it has changed my life radically. Nothing spiritual, just uninterupted sleep.
You can imagine my dismay, when, upon, receiving my travel documents from RCI, I discovered that listed among the electrical appliances I am not allowed to bring on board was my TurboSteam Brewmaster 2000 Coffee Maker- which I normally take with me everywhere. I can (possibly) understand the ban on my Stainless Steel MultiChoice EuroBlend Latte and Expresso machine, but my coffee maker?
I was further concerned that SailorJill could not bring aboard our Centennial Megawatt Pressmaster Power Iron. How can I possibly look sharp at the formal dinner without freshly pressed shirts and pants? SailorJill took it in good stride, however, and managed to masterfully cover up what I am sure was her deep disappointment at this exclusion.
While not specifically listed, I am beginning to suspect that I might not even be allowed to board with my PowerNuker 6000 Combo Microwave/Convection Travel Oven. Perhaps I could send it ahead?