michelleeng
Cabin 9652Aug 11, 2026
It was spacious enough for me and my husband. I really had a great view of the ocean and was out on the balcony every day. I already miss that cabin and the view of the ocean.
BalconyMariner of the Seas · Cabin category 3B
Mariner of the Seas 3B Balcony Cabins
Cabin category 3B is a standard-size balcony cabin on Mariner of the Seas: 279 3B cabins on decks 6, 7, 8, 9 and 10, each 203 sq ft with a 42 sq ft balcony.
279cabins
203 sq ft+ 42 sq ft balcony
Up to 4guests
6, 7, 8, 9 & 10decks
See balcony faresBalcony cabins on Mariner of the Seas from $65 pp/night. We price by cabin type, not by category.
// 01 · Floor plan
Mariner of the Seas 3B balcony floor plan
Interior203 sq ft
Balcony42 sq ft
Total245 sq ft
- Sleeps
- Up to 4 guests173 cabins sleep 2 · 11 sleep 3 · 95 sleep 4
- Beds
- One Royal King bed (can convert into two twin-size beds) · One double sofa bed in staterooms with up to 4 guests
- Bathroom
- One bathroom
- Living space
- Room with bed, vanity and sitting area with sofa
3B's total size vs every category on the shipInterior plus balcony, from the smallest category to the largest.
3B245 sq ft
106 sq ft2W · smallest
1484 sq ftRS · largest
// 02 · Compare
How Mariner of the Seas 3B cabins compare
Mariner of the Seas 3B balcony cabins are standard size: the same 203 sq ft as 2 other balcony categories, with a 42 sq ft balcony, the smallest among balcony categories; 10% of its cabins connect to a neighbor.
3B: 203 sq ft · tied #2 with 2 others of 10 balcony categories
Balcony avg · 207 sq ftShip avg · 272 sq ft
2BSpacious Ocean View Balcony - Accessible275 sq ft3BSpacious Ocean View Balcony203 sq ft1BSpacious Ocean View Balcony203 sq ftSGSpacious Sunset Ocean View Balcony203 sq ft1DOcean View Balcony198 sq ft5DOcean View Balcony198 sq ft2DOcean View Balcony198 sq ftCBConnecting Ocean View Balcony198 sq ftSBSunset Ocean View Balcony198 sq ft4DOcean View Balcony198 sq ft
// 03 · Deck plan
Find Mariner of the Seas 3B cabins on the deck plan
Deck 6 · 70 3B cabins
Swipe to pan · tap a cabinHover a cabin · click to pin3BBalcony70
// 04 · Reviews
Mariner of the Seas 3B Cabin Reviews
5.0
2 reviewsFrom 2 different 3B cabins
5stars
2
4stars
0
3stars
0
2stars
0
1stars
0
Stayed in a 3B cabin on Mariner of the Seas? Help future cruisers know what to expect.
StarryClover
Cabin 9366Aug 10, 2026
Our room had a beautiful unobstructed view of the ocean. I got an absolute amazing photo of the moon on our second night. And our steward made the perfect towel monkey and a bear for us. We just kept them on the bed and hanging from our curtains the whole time.
// 05 · Alternatives
Closest alternatives to Mariner of the Seas 3B
Only what's different from 3B is shown.
SG
Spacious Sunset Ocean View Balcony10 cabins
Same size, on higher decks
Decks 8 & 10+10 pts connecting
See SG
2B
Spacious Ocean View Balcony - Accessible8 cabins
More room inside and out
+72 sq ft inside+23 sq ft balconyDecks 6 & 7All midshipNo connecting cabinsSleeps up to 2
See 2B
4D
Ocean View Balcony9 cabins
Similar size, on higher decks
−5 sq ft inside+4 sq ft balconyDecks 7, 8, 9 & 10All forward+1 pts connectingSleeps up to 2
See 4D// 06 · Location
Where 3B balcony cabins sit on Mariner of the Seas
Most 3B cabins are aft: 65% of those with a recorded position. 3B cabins are on decks 6, 7, 8, 9 and 10; deck 6 has the most (70).
Forward · Midship · Aft
BOWSTERN
Forward35%98 cabins
Midship0%0 cabins
Aft65%181 cabins
Port · Starboard
Port49%137 cabins
Starboard51%142 cabins
Deck spread
Deck 6
70
Deck 7
68
Deck 8
65
Deck 9
54
Deck 10
22
// 07 · What's inside
What's inside a Mariner of the Seas 3B balcony
These spacious Deluxe Ocean View Staterooms offer a spectacular view for a memorable vacation. On Mariner of the Seas, Spacious Ocean View Balcony staterooms (category 3B) measure 203 sq ft, plus a 42 sq ft balcony, and sleep up to 4 guests. Beds: one Royal King bed that converts into two twin beds and one double sofa bed (in rooms for 4). Mariner of the Seas has 279 3B cabins, on decks 6–10.
One bathroom. Room with bed, vanity and sitting area with sofa.
Included
- Dedicated stateroom attendant
- Daily cleaning service
- Exclusive bedding collection
- Stateroom climate control
- Ample closet and storage
- In-room HD-TV
- In-room safe for valuables
- Hair dryer
- Deluxe toiletries: shampoo, conditioner & body wash
// 08 · Photos
Mariner of the Seas 3B cabin photos
// 09 · Every cabin
All 279 cabins in category 3B
Deck 6
70 cabins6214Sleeps 46216621862206222622462266228623062326234623662386240Sleeps 46246Sleeps 4633063326334633663386340634263446346ConnectingSleeps 46348ConnectingSleeps 46350Sleeps 46352Sleeps 46354Sleeps 46356Sleeps 46358Sleeps 46360636663686370637263786514Sleeps 465166518652065226524652665286530653265346540Sleeps 46546Sleeps 46630Sleeps 46632663466366638664066426644Sleeps 46646Connecting6648ConnectingSleeps 46650Sleeps 46652Sleeps 46654Sleeps 46656Sleeps 46658Sleeps 4666066666668667066726678Sleeps 4
Deck 7
68 cabins7214ConnectingSleeps 47216ConnectingSleeps 47218722072227224722672287230723272387240Sleeps 47246Sleeps 4733473367338734073427344734673487350Sleeps 47352Sleeps 47354Sleeps 47356Sleeps 47358Sleeps 473607362Connecting7364ConnectingSleeps 4736673687370737273787514ConnectingSleeps 47516ConnectingSleeps 47518Sleeps 47520Sleeps 47522Sleeps 47524752675287530753275347540Sleeps 47546Sleeps 47630ConnectingSleeps 47632ConnectingSleeps 476347636763876407642764476467648Sleeps 47650Sleeps 47652Sleeps 47654Sleeps 47656Sleeps 47658Sleeps 4766076667668767076727678
Deck 8
65 cabins8216Sleeps 48218ConnectingSleeps 48220ConnectingSleeps 48222Sleeps 48224Sleeps 4822682288230823282388240Sleeps 48246Sleeps 48336833883408342834483468348835083528354Sleeps 48356Sleeps 48358Sleeps 48360Connecting8362Connecting836483668368837083728374837683788516Sleeps 48518ConnectingSleeps 48520ConnectingSleeps 485228524852685288530853285348540Sleeps 48546Sleeps 4863886408642864486468648865086528654Sleeps 48656Sleeps 48658Sleeps 486648666866886708672867486768678
Deck 9
54 cabins9220ConnectingSleeps 49222Sleeps 49224Sleeps 49226Sleeps 49228Sleeps 49230ConnectingSleeps 49232ConnectingSleeps 4933893409342934493469348935093529354Sleeps 49356Sleeps 49358Sleeps 49360Sleeps 493629364936693689370937293749376Connecting9520ConnectingSleeps 49522Sleeps 49524Sleeps 49526Sleeps 49528Sleeps 49530Sleeps 49532Sleeps 4963896409642964496469648965096529654Sleeps 49656Sleeps 49658Sleeps 4966096629664966696689670967296749676Connecting
// 10 · Known issues
Known issues in cabin category 3B
No issues recorded for 3B cabins.
// 11 · Prices
Balcony prices on Mariner of the Seas
Prices are by cabin type. We don't price individual categories like 3B; "See balcony fares" opens current balcony fares with our booking partner.
Lowest fare by type · per person / night
Balcony is $17 more per night than an ocean view cabin, and $71 less per night than a suite.
$41
+$7$48
+$17$65
+$71$136
InsideOcean ViewBalconySuite
Prices below recent average · now
56%of sailings
56% of upcoming Balcony sailings are currently below their recent average fare.
// 12 · Other ships
3B on other Royal Caribbean ships
Mariner of the SeasTHIS SHIP279 cabins · 203 sq ft + 42 sq ft balcony
245 sq ft
Adventure of the Seas284 cabins · 188 sq ft + 50 sq ft balcony
238 sq ft
Independence of the Seas279 cabins · 207 sq ft + 42 sq ft balcony
249 sq ft
Navigator of the Seas279 cabins · 203 sq ft + 42 sq ft balcony
245 sq ft
Voyager of the Seas278 cabins · 203 sq ft + 42 sq ft balcony
245 sq ft
Liberty of the Seas272 cabins · 207 sq ft + 65 sq ft balcony
272 sq ft
Explorer of the Seas271 cabins · 203 sq ft + 42 sq ft balcony
245 sq ft
Freedom of the Seas204 cabins · 207 sq ft + 42 sq ft balcony
249 sq ft
Enchantment of the Seas49 cabins · 191 sq ft + 39 sq ft balcony
230 sq ft
Rhapsody of the Seas49 cabins · 195 sq ft + 35 sq ft balcony
230 sq ft
Vision of the Seas49 cabins · 195 sq ft + 35 sq ft balcony
230 sq ft
Grandeur of the Seas44 cabins · 195 sq ft + 39 sq ft balcony
234 sq ft
Jewel of the Seas35 cabins · 204 sq ft + 41 sq ft balcony
245 sq ft
Serenade of the Seas34 cabins · 204 sq ft + 41 sq ft balcony
245 sq ft
Brilliance of the Seas32 cabins · 204 sq ft + 41 sq ft balcony
245 sq ft
// 13 · FAQ
Mariner of the Seas 3B cabin FAQ
How big is a Mariner of the Seas 3B balcony cabin?
203 sq ft inside plus a 42 sq ft balcony: 245 sq ft in total. That is the most common balcony size on Mariner of the Seas.
How many Mariner of the Seas 3B cabins are there, and on which decks?
279 cabins on decks 6, 7, 8, 9 and 10; deck 6 has the most (70).
How many people can stay in a Mariner of the Seas 3B cabin?
Up to four. 173 cabins sleep 2, 11 sleep 3 and 95 sleep 4.
What's the difference between cabin category 3B and SG on Mariner of the Seas?
They are the same size (203 + 42 sq ft). SG cabins are on decks 8 and 10; 3B cabins are lower, on decks 6, 7, 8, 9 and 10.
Do Mariner of the Seas 3B cabins connect?
Yes: 29 of the 279 3B cabins (10%) connect to a neighboring cabin.
// 14 · Next steps