My wife and I are going on a cruise November 1 (Sunday), which may not have a Mass on board. We can go to Mass the Saturday prior to the cruise but Sunday the 8th we cannot. We get off the cruise ship, go to the airport, and are back home at 5:30 PM. Are we at sin in not going?
No, but a few phone calls would tell you whether or not it is possible to attend Mass on Saturday evening, November 7, onboard ship, and many cruise lines offer chaplain services or arrange for such services for passengers who request them. It would be best to consider such pre-planning for Mass a standard part of arranging a trip.