The Chamak-class missile boats (NATO code: Osa II class) of the Indian Navy were an Indian variant of the Soviet Project 205 Moskit.

[1][2] The Osa-II Class missile boats formed the 25th Missile Vessel (K25) Squadron, also known as the Killers, based at Vizag.

Osa is the Russian word for Wasp.

All eight missile boats have been decommissioned from service.

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