# U-3521

> 1944 Type XXI submarine

**Wikidata**: [Q9363937](https://www.wikidata.org/wiki/Q9363937)  
**Source**: https://4ort.xyz/entity/u-3521


## References

1. The Submarine War, 1939-1945
2. [Source](http://www.ubootarchiv.de/ubootwiki/index.php/U_3521)
3. [Source](https://uboat.net/boats/u3521.htm)
4. [Source](https://uboat.net/technical/shipyards/schichau.htm)