Souter Lighthouse (grid reference NZ408642) is a lighthouse located in the village of Marsden in South Shields, Tyne & Wear, England. Souter was the first lighthouse in the world to be actually designed and built specifically to use alternating electric current, the most advanced lighthouse technology of its day.The lighthouse was a much-needed aid to navigation due to the number of wrecks on the dangerous reefs of Whitburn Steel which lay directly under the water in the surrounding area.