Wreck 5005 is known as the 'Gun Wreck', but may be the remains of the Umba, a Rostock built merchant vessel, which was taken as a prize by the British in World War I, and torpedoed by a German submarine in 1918.

The wreck was surveyed with sidescan and magnetometer in 2002. The sidescan data shows a large wreck (96m x 13m) which appears to be largely buried. The magnetometer data confirms that the wreck is built from steel or iron. No diving took place on the wreck site.