Sidescan sonar - Umba

This wreck is the remains of the Umba, an early 20th century merchant vessel that was torpedoed by a German submarine in 1918. The wreck is also commonly known as the "Gun Wreck" after a Russian 6 pounder gun was found mounted on the poop.
 
The site is located 5.5nm south of Hastings, just to the east of Hastings Shingle Bank. It is lying at a general depth of 22m C.D.
 
In 2002 the wreck was surveyed using sidescan sonar and magnetometer. The geophysics results confirmed that the vessel was built of either steel or iron, and although largely buried, its dimensions are 96m x 13m. Sidescan images show the wreck is lying on an even keel and standing about 4.5 metres high. The site was not dived during this year's fieldwork due to hazardous dive conditions.
 
In the summer of 2005, the site was surveyed using a ROV (remotely operated vehicle). Most of the original wooden decking still remains on the poop, showing how well preserved the wreck is. Examples of the ROV video footage together with underwater photos, a site plan and more information about the Umba (including its construction, vessel type, fittings and machinery) can all be viewed here.
 
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