The Kaivan (Persian: کیوان) is a class of large patrol craft operated by the Islamic Republic of Iran Navy.

They ships in the class are modified versions of the American Cape-class vessels, built by the United States Coast Guard Yard in the 1950s.

Sources cite displacement of Kaivan class vessels slightly different.

[1] Conway's All the World's Fighting Ships puts the numbers at 98 tonnes (96 long tons) and 148 tonnes (146 long tons) for standard and full load displacements respectively.

[2] Combat Fleets of the World mentions only 85 tonnes (84 long tons).