Cruise ship designers and operators were early to appreciate the merits of azimuthing podded propulsion systems, in which a frequency converter-controlled electric motor housed in a 360-degree submerged rotatable pod is directly connected to a fixed pitch propeller. ABB Marine’s pioneering Azipod was first installed from the mid-1990s on Carnival’s Elation and Paradise, the last pair of an eight-ship Fantasy-class series. Azipods improved propulsive efficiency over the earlier siste....

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