daysatsea,
These three ships were called the Century class by Chandris when he announced the building of three new ships back in the early 90's. All three ships were planned for at the same time and built in the same yard. The Century came out first and therefore the class is named for her.
To say that ships are of the same class means that they have the same basic plan.
Ships of the same class share, also called sister ships, the same basic set of plans. There can be minor differences from one vessel of a class to the next, such as the difference in the layout of the cinema area between MV
Galaxy and MV
Mercury, or the reassignment of certain spaces like Notes, Words, The Tower, and The Conservatory on the vessels of the
Millennium class, but the vessels must share a common hull. The former MV
Horizon and MV
Zenith (
Horizon class) met this test, as do GTS
Millennium, GTS
Constellation, GTS
Infinity, and GTS
Summit.
Celebrity's original plan for MV
Century, MV
Galaxy, and MV
Mercury may have been to build three sisters, but a complete redesign occurred between the first vessel and the second. The dimensions show MV
Century does not even share a common hull with MV
Galaxy and MV
Mercury. In proper maritime usage, the new design of MV
Galaxy and MV
Mercury constitutes a separate class from MV
Century.
MV Century
Occupancy: 1770
Tonnage: 70,606
Length: 815 feet
Beam: 105 feet
Draught: 25
MV Galaxy
Occupancy: 1896
Tonnage: 77,713
Length: 866
Beam: 105.6 ft
Draught: 25
MV Mercury
Occupancy: 1884
Tonnage: 77,713
Length: 866 feet
Beam: 105.6 ft
Draught: 25.5
They corrected and improved the other two ships just as the Zenith was bigger and improved over the Horizon (both of those ships were listed as the same class.
In fact, the differences between th former MV
Horizon and MV
Zenith were quite minor and superficial. The vessels do share a common hull, propulsion system, etc. They redesigned the forward observation lounge, the pool area, and a few other public spaces, but pretty nearly everything is in the same place.
The Century, Galaxy and Mercury are all the same class, but the Galaxy and Mercury are sister ships.
No. Ships of the same class are sister ships and
vice versa. These terms are synonymous.
I have the inaugural book from the Century's maiden voyage that talks about the class of ships - that there were to be three ships in this class.
Again, what "was to be" is no what IS. The redesign after the lead ship produced a different class of vessels.
Norm.