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Ships like Mariner of the Seas

Mariner of the Seas (Royal Caribbean) measures 139,863 gross tons and carries 3,344 guests (double occupancy). These 8 ships in service are the closest matches on those two published figures, 6 of them on other lines.

Ship	Line	Entered service	Gross tonnage	Guests	Crew	Length
Mariner of the Seas	Royal Caribbean	2003	139,863	3,344 double occupancy	1,200	1,020 ft (310 m)
Navigator of the Seas	Royal Caribbean	2002	139,999	3,368 double occupancy	1,232	1,020 ft (310 m)
Explorer of the Seas	Royal Caribbean	2000	137,308	3,286 double occupancy	1,185	1,020 ft (310 m)
Celebrity Ascent	Celebrity	—	141,420	3,260 double occupancy	—	1,073 ft
Celebrity Beyond	Celebrity	—	141,420	3,260 double occupancy	—	1,073 ft
Regal Princess	Princess	—	142,229	3,560 as published	1,346	1,083 ft
Royal Princess	Princess	2013	142,229	3,560 as published	1,346	1,083 ft
Majestic Princess	Princess	2017	143,700	3,560 as published	1,346	1,083 ft
Sky Princess	Princess	2019	141,000	3,660 lower berths	1,346	1,083 ft

— = not published in the cruise line's source. Each figure links back to its source on the ship's page.

How we pick similar ships

Closeness = difference in gross tonnage plus difference in guest count, both from each line's own figures. Ships not yet sailing and ships with too few published figures are left out. Methodology.