Can I invite friends onboard my cruise ship? 21 June 2022 15:35 Updated Due to the stringent security measures, only cruise passengers with a valid booking are allowed onboard the cruise ship. Related articles What currency is used onboard? What should I wear on my cruise? Do I have to get off the ship at every port of call? Will arrival and embarkation times be allocated to me? Will my cruise ship have laundry facilities?