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Koeln

Type: Light Cruiser - Dresden II class
  Koeln
Commission: The Koeln was built in Hamburg over 1915 - 1916. Launched October 1916.
History: The Koeln was built to replace its predecessor which was sunk at the Battle of Heligoland Bight in August 1914. She joined the German navy in early 1918, but apart from a little scouting saw no action. By the time of the Scapa internment, the Koeln was in bad repair and her slow speed held up the Fleet. The boat was scuttled at about 14.00 on 21st June 1919.
Diving:

The Koeln is in good condition, and makes for an excellent dive. The boat is in 35 metres of water and lies on its starboard side with a very slight list. Because of the orientation of the wreck, the Koeln is quite light when the sun is out and it is easy to make out many of the structures on her. There are many ways of diving the Koeln. You can descend straight to the sea bed at 35 metres and then work your way up the vertical deck. Or else land midships on the port rail and either go to the bows or stern making sure to buoyant on mid deck level (about 25 - 30 meters). Or stand from one end and go straight to the other. The Koeln is large enough and interesting enough to make a few dives necessary before you get the picture.

The highest point is 20 metres which is the midpoint port rail. It makes a convenient place to start a dive from particularly if the shot is near here (which it often is). Although it is possible to stay around this depth and inspect a port side midmast 6 inch gun whose barrel points upwards, you need to go deeper to see the best of the wreck. You could continue to the stern and pass over a salvage hole towards the sternmost pair of 6 inch guns. They are both in good condition. By swimming over the stern you can then land on the long rudder (there is no propellor!). An impressive sight.

Or else move along towards the bows and pass the lifeboat davits that dangle over the side of the boat. You can look over and see the deck of the boat plunging down to the dark seabed some 15 metres below. As you approach the bows the depth increases down to around 28 metres. Near the sleek almost knife edge bows are two capstans with the remainder of the anchor chains. Behind the capstans working back toward the mainmast are the platforms of two 6 inch guns which have now disappeared. The mainmast still has a basically intact structure.

When diving this wreck it is easy to imagine being on a fast and lean cruiser. Her remaining guns are well preserved and even unpromising items like lifeboat davits and the holes left by her absent funnels are all memorable and add to the unique atmosphere that this wreck creates.

Read Divernet's dive description of the Koeln