You should arrive at the seaport early, as seaport security may require extra time to inspect your POC during the security screening process. Most cruise ships have onboard plugs both in your room and around the ship for regular, easy-access charging, so there is less worry about not having regular access to electric outlets than with other forms of travel.

Some cruise ships require physician forms before you travel to verify the need for POC accommodation, so check with your cruise provider when booking your travel.