We were on Navigator for a 7 night cruise in March this year. There were 5 ice shows on the cruise - 7:00pm and 9:15pm on 2 days (day 3 and day 5) and 1:00pm on a sea day (this was day 6 or 7).
You do not need a reservation.
Doors open about 45 minutes before the show. Arrive early to ensure a good seat!
The Ice cast is so talented, and the show is amazing! One of the best ice shows of all the Royal Caribbean ships!
You may want to see it more than once!😜