Built in Hamburg, and launched in 1916.  A "Kleiner Kruizer", light cruiser/mine layer displacing 5531 tons and an overall length of 510 feet (155 metres).  

The Coln lies in 30-35 metres of water, resting on her starboard side.  The least depth over her port side is about 20 metres.  She is relatively intact, apart from a hole blasted at her stern, and minus her propellers and anchor.  The features of the ship are clearly recognisable though covered in a variety of marine life, including sponges and brittlestars.