Category Scores
General / BalancedYoung FamilyLuxury TravelerMature Couple / RetiredSolo TravelerActive / AdventureAdult Couples
Space & Comfort
38Beats 1% of ships
Dining
62Beats 35% of ships
Entertainment
78Top 27% of ships
Activities & Thrills
67Top 45% of ships
Pools & Relaxation
87Top 13% of ships
Value / Cost
38Beats 13% of ships
Line shading shows where all scored ships land in each category · dot = this ship · scored for the traveller type selected above
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What We Like
Strong Pools & Relaxation — scores 87/100
Strong Entertainment — scores 78/100
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Worth Knowing
Space & Comfort is a relative weak point at 38/100
Value / Cost is a relative weak point at 38/100
Fewer crew per guest — about 3 guests to each crew member
Daily gratuities are expected on top of the fare
General
Cruise LineCosta
Ship NameDiadema
Maiden voyage1 November 2014
Physical
Year Built2014
Refurbished 2020
ⓘ
The year of the ship's most recent major refit or renovation.
BuilderFincantieri
Gross Tonnage 133,019 tons
ⓘ
A measure of a ship's enclosed volume, not its weight. Higher usually means more decks, space and amenities.
Length 305.7 m
ⓘ
Overall length of the hull from bow to stern.
Width/Beam 37.2 m
ⓘ
The ship's width at its widest point. A wider hull is steadier but limits which ports and canals it can use.
Ship Within a ShipSamsara Spa area (spans decks 14-15, with dedicated pool, Jacuzzis, thalassotherapy pool, restaurant, and lounge for spa-cabin guests)
Total decks 14
ⓘ
Total number of decks, including crew-only and service decks.
Passenger Decks14
Speed 22.5 knots
ⓘ
Cruising speed in knots (nautical miles per hour). One knot is about 1.15 mph.
Passengers and Crew
Crew1,253
Passenger to Crew Ratio 3
ⓘ
Guests per crew member. Lower means more staff per passenger, which usually means more attentive service.
Total Cabins1,886
Single Occupancy Cabins No
ⓘ
Whether the ship has cabins built for solo travellers (often without a single supplement).
Wheelchair-Accessible Cabins8
Passenger Capacity 4,947
ⓘ
The maximum number of guests the ship can carry at full occupancy.
Space Ratio (tons of ship per passenger) 26.889
ⓘ
Gross tonnage divided by passenger capacity — a rough 'spaciousness' gauge. Higher means more room per guest.
Amenities
Restaurants8 restaurants and snack bars, including Fiorentino (main dining), La Piazza/Piazza Pizza, Corona Blu, Sissi Restaurant, plus specialty venues Club Diadema (fine dining), Tavola Teppanyaki, and Samsara Restaurant
Restaurants - Paid4
Restaurants - Included3
Onboard Currency Euro
ⓘ
The currency used for onboard purchases and billing.
Total Pools3
- Pools - General Access3
- Pools - Adults Only0
- Pools - Exclusive3
Outdoor Pools3
Water Playground/Splash ParkNo
Kiddie/Splash PoolYes
Total Hot Tubs8
- Hot Tubs - General Access8
- Hot Tubs - Adults Only8
- Hot Tubs - Exclusive8
WiFiYes
Internet CenterYes
Cell Phone ServiceYes
Bars/Lounges11
Beauty Salon/Barber ShopYes
CasinoYes
ChapelNo
Night ClubYes
Laundromats (self service)No
Laundry/Dry CleaningYes
LibraryYes
Movie TheatreYes
Outdoor Movie ScreenNo
Onboard WeddingsYes
SpaYes
Video ArcadeYes
Basketball CourtYes
Tennis CourtYes
Fitness CenterYes
Ice Skating RinkNo
Jogging TrackYes
Mini-Golf CourseNo
Rock Climbing WallNo
Water SlideNo
Water Sports PlatformNo
24-Hour Room ServiceYes
BabysittingYes
Children's PlayroomYes
Supervised Youth ProgramYes
Teen CenterYes
Kosher MealsNo
Adult Only Relaxation AreaYes
Special Amenities4D cinema hall, Samsara Spa across multiple decks with thalassotherapy pool, casino, cigar lounge, hair salon, video arcade, teen lounge, jogging track, outdoor promenade over 500m long
Costs and Gratuities
Tip added to drinks & services 15%
ⓘ
The automatic gratuity percentage added to bar tabs and paid services.
Tipping Expected?Yes
Registry & Identifiers
Call sign IBCX
ⓘ
The ship's unique radio identifier used in maritime communications.
IMO number 9636888
ⓘ
A permanent 7-digit ID assigned to the hull for life, even if the ship is later renamed or sold.
MMSI number 247353700
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A 9-digit radio ID broadcast by the ship's transponder for tracking and communications.
Port of registry Italy, Genoa
ⓘ
The ship's legal home port and country of registration — its 'flag'.