Cruise Ship Deck Plans

A deck plan is the floor-by-floor map of a cruise ship: which decks hold cabins, which hold public venues, and where the elevators, stairs and muster stations sit relative to a given room. Every cruise line publishes one for each ship, usually as an interactive tool that breaks down deck by deck. Below is a sourced deck-count comparison across the largest ships afloat, plus what to actually look for on a deck plan before you book.

Deck count by ship

Total decks vs. guest-accessible decks, largest cruise ships by gross tonnage.
Ship Class Total decks Guest decks
Icon of the Seas Icon 20 18
Star of the Seas Icon 20 18
Legend of the Seas Icon 20 18
Utopia of the Seas Oasis 18 16
Wonder of the Seas Oasis 18 16
Symphony of the Seas Oasis 18 16
Harmony of the Seas Oasis 18 16
Oasis of the Seas Oasis 18 16
Allure of the Seas Oasis 18 16
MSC World America World 22 16

Source: Royal Caribbean, MSC Cruises and cruisedeckplans.com ship specifications, retrieved 2026-09-17. Icon-class detail: Icon of the Seas deck plan guide. Carnival's largest ships: Carnival deck plans.

What to check on a deck plan before booking

Three things matter more than the deck number itself. First, what's directly above and below a cabin: a room under a pool deck, sports court or nightclub can mean early-morning chair-dragging or late-night bass through the floor, while a room under another row of cabins is usually quieter. Second, distance from the nearest elevator bank; on a ship over 1,000 feet long, a cabin at the far end of a deck can mean a genuinely long walk to dinner. Third, forward, midship or aft: midship cabins generally feel the least motion in rough seas, forward cabins feel the most pitch, and aft cabins often get a larger balcony but more vibration from the engines below.

Total decks vs. guest-accessible decks

A ship's total deck count includes crew-only areas, engineering spaces and technical decks passengers never see, so it's always higher than the number of decks a passenger can actually reach. Icon-class ships run 20 total decks with 18 open to guests; Oasis-class ships run 18 total with 16 open to guests. That two-deck gap between "total" and "guest" is typical across most large modern ships, and it's the number to watch for if you see two different deck counts quoted for the same ship.

Want the detail for a specific ship or line? Start with the Icon of the Seas deck plan guide or Carnival deck plans, see how these ships stack up on size or the size comparison, and check when they're actually in port on the cruise line trackers.

Frequently asked questions

What is a cruise ship deck plan?

A deck plan is a floor-by-floor diagram of a cruise ship, showing which decks hold cabins, which hold public venues like dining rooms and pools, and where things like elevators, stairs and the muster stations for each cabin sit. Cruise lines publish one for every ship, usually as an interactive tool on the ship's own page.

Why do cruise ships have so many decks?

A modern mega-ship packs a small city's worth of venues into its hull: multiple dining rooms, theaters, pools, a spa, shops and thousands of cabins. Spreading that across 15-20+ decks keeps each individual deck a manageable size to walk, and lets the ship group similar spaces together (cabins on mid decks, entertainment low and amidships, pools and open decks up top).

What is the difference between "total decks" and "guest decks" on a ship?

Total decks counts every level in the hull, including crew-only areas, engineering spaces and technical decks that passengers never see. Guest decks (sometimes called passenger-accessible decks) is the smaller number: the decks a passenger can actually reach, whether or not they have a cabin.

How do I use a deck plan to pick a cabin?

Check three things against the plan: what's directly above and below the cabin (a cabin under a pool deck or nightclub can mean early-morning or late-night noise), how far it is from the nearest elevator bank (a long walk matters more on a 1,000-foot ship), and whether it's forward, midship or aft (midship usually has the least motion in rough seas).

Does this site show a venue-by-venue deck plan for every ship?

Not yet, and we'd rather say so than fabricate one. The comparison below uses sourced deck-count figures for the largest ships; a full venue-level deck plan is planned as a future addition once we can source it directly from the cruise line rather than estimate it.