Sina (Persian: سینا) is a class of upgraded Kaman-class fast attack craft developed by Iran.

[2] Abhijit Singh, a senior fellow at Observer Research Foundation described the project as "a proud testimony of Iran’s abilities at reverse engineering".

[5] Ships of this class are equipped with four box launchers with C-802 or Noor, as well as one 76 mm (3 in) main gun.

[1] As of 2015, four ships (Sina 5 to 8) were under construction, two of them in the Caspian Sea and the other two at Bandar Abbas.

[6] In 2020, Farzin Nadimi of The Washington Institute wrote that production of these ships has not improved as expected.