A close view of the aft end of the starboard forward poppet and the bilge keel of the Royal Navy battleship Thunderer (1911) on the building berth at the Thames Iron Works shipyard at Blackwall, London. The photographer is close to the way abreast the poppet looking at the hull of the ship from frame 40 aft. The bilge keel commences at frame 48. The armour belt has not been fitted but the wooden backing is in place. A vertical format negative.