An item reported that the Royal British Navy was testing frangibility of submarines for gunfire. For this purpose was the HMS A1 used on which was fired with lyddite filled shells while she was submerged to a depth of 2,5-3 metres. The result was that she sunk and was to be raised. From there she was first towed to shallow water for a preliminary examination and from there to the dock at Portsmouth, England.(1)
Note
1, Laid down by Vickers, Barrow-in-Furness, England on 19 February 1902, launched on 9 July 1902, sunk during the tests but despite what the item suggested she was not salvaged while she could not be find back until 1989!
