Sun Princess: the glass dome, the LNG answer, and a 2027 to confirm
Sun Princess measures 177,882 gross tons, which Princess rounds to 175,000, across 345 m by 47 m, 20 decks with 16 open to guests and 2,162 staterooms. She sleeps 4,320 at double occupancy, up to 5,189 with every berth in use, with 1,550 crew. Fincantieri delivered her at Monfalcone on 14 February 2024. Lead ship of the class, she spends summer 2026 in the Mediterranean out of Barcelona, Civitavecchia-Rome and Piraeus. Unrelated to the 1995 Sun Princess, now Pacific World.
The Sphere really is a glass dome
The geodesic dome that names the class caps decks 17 and 18: a pool under glass by day, covered at night for aerial circus and candlelight concerts. Below it, the three-storey Piazza opens to the sea through a fully glazed facade, a clean break from the windowless Royal-class atrium. Main productions play in the Princess Arena, two decks and more than 1,000 seats.
LNG: what it fixes and what it does not
The first dual-fuel Princess, LNG and marine diesel. The gain is real and local: sulphur oxides and fine particulates all but gone, nitrogen oxides sharply down, better air alongside. The rest calls for candour. LNG is still a fossil fuel, dual-fuel engines release unburned methane far more warming than CO2, and bunkering is missing in many ports, so she burns diesel at times. The climate gain is modest.
Which cabin, and the rounded aft rooms nobody names
The Sanctuary Collection holds decks 15 and 16 aft with 215 staterooms, 80 of them suites, plus a reserved restaurant, lounge and pool. The Signature Collection covers the Signature, Sky, Owner's and Penthouse suites. The aft corner rooms carry rounded balconies cantilevered over the wake, and Princess publishes no category name for them. Otherwise a balcony amidships on deck 11 or 12 works best.
What disappointed in 2024, and what has not changed
Circulation: services packed amidships, elevators jammed, no full outdoor lap of the ship. Dining: the three-deck main room worked poorly at launch and Princess reshuffled venues in September 2024; the paid share stays high. The pool deck: three modest pools for 4,320 people, the only calm water in the Sanctuary. The Rollglider announced for Park19 never opened. Star Princess got adjustments, not a redesign.
Mediterranean, then Florida, and a 2027 to verify
The 2026 season runs 8, 15 and 22-day loops from Barcelona, Civitavecchia-Rome and Piraeus, then two crossings to Fort Lauderdale, 24 October over 23 days, 31 October over 16. For 2027 the working assumption is Caribbean through mid-March, the Mediterranean from April to October and Florida in early November. That year needs confirming: two readings of the same source disagree, the other describing an almost entirely Caribbean year.
The Medallion, Captain's Circle, the Voyager class
The Medallion is worn: your door unlocks as you approach and an OceanNow order follows you under the Sphere. The irritants: app steps before you travel, your position tracked continuously on board. At Princess Cruises, Captain's Circle counts cruises or days at sea, with Platinum the first genuinely useful tier. The class stops at two ships: the three hulls ordered from Fincantieri in April 2026 form the Voyager class, announced for 2035, 2038 and 2039.
Two ships to compare with Sun Princess
Regal Princess carries the SeaWalk, a glass walkway the Sphere class skipped. Royal Princess opens the earlier generation, 142,714 gross tons against 177,882, fewer people aboard and more included at table.
Who Sun Princess is wrong for
Anyone who walks a full outdoor lap every morning. Anyone who avoids crowds but will not pay for a Sanctuary stateroom to find a quiet lounger. Anyone who sticks to what is included, better served on a Royal-class hull. And anyone choosing her on environmental grounds: LNG improves the air in port, far less the climate.