How our Bliss Filters work
Detailed side-by-side comparison of Celebrity Cruises and Oceania Cruises cruise ships
| Specification | Celebrity Constellation | Sirena |
|---|---|---|
| Cruise Line | Celebrity Cruises | Oceania Cruises |
| Maiden Voyage | 2002 | 2016 |
| Year Refurbished | 2012 | N/A |
| Adults Only | No | No |
| Specification | Celebrity Constellation | Sirena |
|---|---|---|
| Passenger Capacity | 2,038 | 684 |
| Crew Size | 999 | 400 |
| Guest-to-Crew Ratio | 2.04 | 1.71 |
| Specification | Celebrity Constellation | Sirena |
|---|---|---|
| Gross Tonnage | 91,000 | 30,277 |
| Length | 965 ft | 594 ft |
| Width | 106 ft | 83 ft |
| Ship Size Category | Large | Small |
| Number of Decks | 11 | 11 |
| Specification | Celebrity Constellation | Sirena |
|---|---|---|
| Overall Cruiseable Rating | 8.0 / 10 | 9.0 / 10 |
| Roominess Score | 35.8 | N/A |
| Advised For | Cultural, staterooms, romantic, spa and fitness | Cultural, staterooms, romantic, adults, spa and fitness, dining |
