Gawron-class corvette
| ORP Ślązak | |
| Class overview | |
|---|---|
| Name | Projekt 621 (Gawron class) | 
| Builders | Stocznia Marynarki Wojennej | 
| Operators | Polish Navy | 
| Built | 2001–2012 (Program cancelled, completion of only one vessel) | 
| Planned | 7 | 
| Completed | 1 | 
| Cancelled | 6 | 
| Active | 1 | 
| General characteristics | |
| Type | Corvette | 
| Displacement | 1,650–2,050 tonnes | 
| Length | 90.10–95.20 m (295.6–312.3 ft) | 
| Beam | 12.80–13.30 m (42.0–43.6 ft) | 
| Draught | 3.35–3.60 m (11.0–11.8 ft) | 
| Propulsion | 
 | 
| Speed | 29.5 knots (55 km/h; 34 mph) (planned) | 
| Armament | list error: mixed text and list (help) 
 | 
The Gawron class (Polish: rook) or Projekt 621 was a planned class of multipurpose corvettes ordered by Polish Navy. The Gawron class was a variant of the MEKO A-100 project developed by the Blohm + Voss shipyard in Germany. Construction of the first ship of the class started in 2001. The project was terminated in February 2012 but in October 2013 a contract was signed to complete the existing hull as a patrol ship by 2016. On 2 July 2015, ORP Ślązak was christened and launched, and on 28 November 2019, ORP Ślązak was officially commissioned into the Polish Navy.