Voyager class · Royal Caribbean · In service since 2003

Mariner of the Seas

Mariner of the Seas is a Voyager class cruise ship operated by Royal Caribbean, in service since 2003. At about 139,863 gross tons, it carries roughly 3,114 guests and ranks #19 by size in the 30-ship Royal Caribbean fleet we cover.

139,863 gross tons
3,114 guests
1,021 ft long

Photo: ATren, CC BY-SA 4.0, via Wikimedia Commons

Cruise line: Royal Caribbean International
Ship class: Voyager class
Entered service: 2003 (23 years ago)
Gross tonnage: 139,863
Guests: 3,114
Length: 1,021 ft (311.1 m)
Speed: 23 knots
Builder: Kvaerner Masa-Yards
Flag: The Bahamas
IMO number: 9227510

About Mariner of the Seas

Mariner of the Seas closed out the Voyager class in 2003 and was among the first older ships to get the full Royal Amplified treatment in 2018. That refit added new waterslides, laser tag and refreshed bars and restaurants, bringing it closer to the line’s newer ships. Its three- and four-night Bahamas runs from Florida, usually with a day at Perfect Day at CocoCay, have introduced plenty of families to cruising. The classic class features remain, from the Royal Promenade to the ice rink and rock-climbing wall.

Best for: First-time cruisers and families who want a short, energetic Bahamas trip with a CocoCay beach day.

Mariner of the Seas highlights

Waterslides added in its 2018 Royal Amplified refit
Laser tag, set up in the ice arena
Royal Promenade, the indoor street of shops and bars
Rock-climbing wall and mini-golf
Adventure Ocean kids’ club

How Mariner of the Seas compares in size

Gross tonnage measures a ship's enclosed volume, not its weight. Source: Wikidata.

Voyager class sister ships

Sailing with Royal Caribbean

Royal Caribbean is the big-ship, high-activity line: surf simulators, water slides, ice rinks and Broadway shows on some of the largest cruise ships ever built. It suits families, groups and active couples who want a floating resort and a private-island beach day, and it’s less suited to anyone who wants quiet, small ships or an all-inclusive fare.

Read our full Royal Caribbean guide: dining, drinks, tipping and who it suits →

Where Royal Caribbean sails

Mariner of the Seas FAQs

How big is Mariner of the Seas?

Mariner of the Seas measures about 139,863 gross tons and is about 1,021 feet (311 m) long. That makes it #19 of 30 Royal Caribbean ships we cover by tonnage, and #67 among all 255 ocean cruise ships in our guide.

How many passengers does Mariner of the Seas carry?

About 3,114 guests, according to Wikidata's record for the ship. Cruise lines usually quote capacity at two guests per cabin; with third and fourth berths filled, the maximum is higher.

When was Mariner of the Seas built?

Mariner of the Seas entered service in 2003 and was built by Kvaerner Masa-Yards. Older ships are often refurbished, so ask about recent upgrades when you compare sailings.

What class of ship is Mariner of the Seas?

Mariner of the Seas belongs to Royal Caribbean's Voyager class, alongside Voyager of the Seas, Explorer of the Seas, Adventure of the Seas, Navigator of the Seas. Ships in the same class share a layout and most signature features.

Is Mariner of the Seas good for families?

Kids are a core audience. Adventure Ocean runs supervised, age-grouped programs for children 3 to 12 (with group babysitting late in the evening for a fee), and teen clubs give 12- to 17-year-olds their own lounge and activities. Facilities vary by ship, so check what Mariner of the Seas offers for your kids' ages.

Updated November 2026 by the BookMyDreamCruise editorial team. How we research and fact-check.

Sources: Wikidata, Wikipedia, Royal Caribbean official site.