Eleonora Mærsk is one of the world's largest container ships operated by A. P. Moller and registered to Svendborg, Denmark.

It is a fully cellular container ship with 23 holds, and a total carrying capacity of 15,500 TEU.

[2] The vessel is powered by a Wärtsilä-Sulzer 14RTFLEX96-C diesel engine, capable of producing 80,905 kilowatts (108,495 hp) driving one propeller.

[1] Eleonora Mærsk is a sister ship of Emma Maersk[3] and has a maximum speed of 27 knots (50 km/h; 31 mph).

The ship was specifically designed to sail through the Asian trade route, and has the largest combustion engine ever built.