ORP Grom is an Orkan-class

Orkan class

The Orkan class or projekt 660 is series of three fast attack craft of the Polish Navy, in service since 1992.-History:...

 fast attack craft

Fast Attack Craft

Fast Attack Craft are small, fast, agile and offensive warships, that are armed with anti-ship missiles, guns or torpedoes. These are usually operated in close proximity to land as they lack both the sea-keeping and all-round defensive capabilities to survive in blue water. The size of the vessel...

 , sister ship of Orkan

ORP Orkan

ORP Orkan formerly HMS Myrmidon was an M-class destroyer of the Polish Navy during World War II. The name translates as "windstorm". She was sunk by U-378 on October 8, 1943 in the Barents Sea...

 and Piorun.

The original project was prepared by the German Democratic Republic

German Democratic Republic

The German Democratic Republic , informally called East Germany by West Germany and other countries, was a socialist state established in 1949 in the Soviet zone of occupied Germany, including East Berlin of the Allied-occupied capital city...

 for its navy and was named Project 660 ("Sassnitz class" in NATO code). After the Unification of Germany

German reunification

German reunification was the process in 1990 in which the German Democratic Republic joined the Federal Republic of Germany , and when Berlin reunited into a single city, as provided by its then Grundgesetz constitution Article 23. The start of this process is commonly referred by Germans as die...

 the unfinished hull

Hull (watercraft)

A hull is the watertight body of a ship or boat. Above the hull is the superstructure and/or deckhouse, where present. The line where the hull meets the water surface is called the waterline.The structure of the hull varies depending on the vessel type...

s were bought by the Polish Navy

Polish Navy

The Marynarka Wojenna Rzeczypospolitej Polskiej - MW RP Polish Navy, is the branch of Republic of Poland Armed Forces responsible for naval operations...

 from VEB Peenewerft shipyard in Wolgast

Wolgast

Wolgast is a town in the district of Vorpommern-Greifswald, in Mecklenburg-Vorpommern, Germany. It is situated on the bank of the river Peenestrom, vis-a-vis the island of Usedom that can be accessed by road and railway via a bascule bridge...

 and successfully completed in Northern Shipyard in Gdańsk

Gdansk

Gdańsk is a Polish city on the Baltic coast, at the centre of the country's fourth-largest metropolitan area.The city lies on the southern edge of Gdańsk Bay , in a conurbation with the city of Gdynia, spa town of Sopot, and suburban communities, which together form a metropolitan area called the...

.

After its completion in 1995 the ship was incorporated into the 31st Rocket Warships Squadron, 3rd Ship Flotilla

3rd Ship Flotilla

3rd Ship Flotilla is a tactical unit of Polish Navy composed of 11 sub-units. The unit is a main strike force of Polish Navy, it operates various warships types such as frigates, corvettes, submarines or fast attack crafts...

.