Ol-class Tanker

The Ol-class tanker was a class of "fast fleet tankers" in service with the Royal Fleet Auxiliary that were tasked with providing fuel, food, fresh water, ammunition and other supplies to Royal Navy vessels around the world.

Royal Navy

 * RFA Olwen (A122) - former RFA Olynthus
 * RFA Olna (A123)
 * RFA Olmeda (A124) - former RFA Oleander

Iranian Navy

 * IRIS Kharg