Key Aspects: Carnival Cruise Line has confirmed which currencies are used onboard for upcoming repositioning sailings of Carnival Luminosa. Carnival Cruise Line has offered clarification on currencies for several upcoming sailings of Carnival Luminosa. Heald puts it very clearly, however, that the onboard currency will be based on the ship’s departure port for these cruises. Three specific upcoming voyages need to be especially aware of the onboard currency. Guests who want to plan carefully for their onboard budget will want to understand which currency is used onboard.