CARNIVAL HORIZON, debuts this month and will be similar to fleetmate Carnival Vista, which debuted in Spring 2016. This new ship, part of the line's Vista Class, will feature Carnival's 2.0 enhancements as well as a number of innovations unique to the ship, which will be the line's 26th "Fun Ship."

Symphony of the Seas, also debuting this month, is Royal Caribbean's fourth Oasis-class vessel to be built and ready to sail by 2018. Along with third-in-class ship, Harmony of the Seas, which launched in April 2016, these ships are the largest passenger vessels afloat. Symphony of the Seas will include Royal Caribbean's neighborhood concept, which includes spaces such as Central Park and The Boardwalk.

Norwegian Bliss, debuting this month, is the third ship in NCL's Breakaway-Plus Class.

MSC Seaview, launching in May, is the second in MSC's Seaside Class. Each of the ships will have a promenade with shops, restaurants and bars. The 154,400-gross-ton ships will have 2,070 cabins holding 4,140 passengers in double occupancy and 1,413 crewmembers.

AIDAnova, launching this autumn, is the first ship in a brand new class for AIDA that will carry more than 6,000 passengers at full capacity and be capable of using the environmentally-friendly LNG variety of fuel to generate 100 per cent of its power both in port and on the open sea.

Nieuw Statendam, scheduled for a winter launch, is a Holland America cruise ship of the Pinnacle Class, which also includes Koningsdam. It will feature a music walk, which will include B.B. King's Blues Club, Lincoln Center Stage and Billboard Onboard, French brassiere Sel de Mer, and Blend, a wine-mixing venue.

Celebrity Edge, also debuting this winter, comes with a host of first-to-cruise features, including: a movable deck, infinite veranda cabins, resort deck, which features a large pool flanked by sculptural trees and two martini glass Jacuzzis, rooftop garden, and more.