The following is from the Radisson Website:

Quote
For U.S. citizens embarking on a cruise that begins and/or ends in U.S. ports (i.e.: Alaska, New England & Canada, Bermuda and most Caribbean cruises,) government-issued photo identification together with an original or certified copy of your birth certificate or your naturalization certificate is usually acceptable.
However, each time Radisson has not only asked for the passport upon embarkation they have actually taken it from me.

Do you need a passport? Can you just use birth certificate and id for those itineraries mentioned above? What will Radisson do if I refuse to hand over passport for their "safe keeping?"