|Class and type:||Megayacht|
|Displacement:||4,100 metric tons|
|Length:||110.00 m (360.89 ft)|
|Beam:||16.00 m (52.49 ft)|
|Draft:||3.20 m (10.5 ft)|
|Crew:||48 crew members|
Ona, (formerly Dilbar), is a motor yacht built in 2008 by Lürssen. She is owned by Russian oligarch Alisher Usmanov and is named after his mother. With an overall length of 110.00 m (360.89 ft) and a beam of 16.00 m (52.49 ft) she is the 28th largest yacht in the world.
Ona's exterior was designed by Tim Heywood and her interior by Alberto Pinto. The yacht has a helipad on her bow.