Orkan-class or project 600 is called by the NATO Sassnitz-class consisting of three vessels. All three laid down at the VEB Peenerwerft shipyard, Wolgast, Germany bought as unfinished hulls and completed at the Northern Shipyard, Gdansk, Poland. With a displacement of 369 tonnes and gross tonnage of 169 tons are the dimensions 48,90 x 8,65 x 2,15 metres or 160.5 x 28.5 x 7,1 feet. The 3-3.970kW M520 diesel engines allowed a speed of 36 knots and a range of 1.620 nautical miles. Their crews numbered 33 men. The armament consists of 8 RBS-15 Mk. III anti-ship missiles, 1-7,6cm/3”AK-176 gun, 1-3cm/1.2”AK630 gun close in weapon system and 2 Strela 2M launchers. In 2008 modernized.
ORP Orkan (421), MMSI 261242000, call sign SNWH, laid down in 1989, launched in 1992, commissioned on 18 September 1992
ORP Piorun (322), MMSI 261298000, call sign SNWI, laid down in 1989, launched in 1994, commissioned on 11 March 1994
ORP Grom (423), MMSI 261299000, call sign SNWJ, laid down in 1989, launched in 1992, commissioned on 28 April 1995
