By early August, four traversing turrets were fully operational as were all of the Army's railway guns. Seven of these weapons, six 28 cm K5 pieces and a single K12 gun with a range of , could only be used against land targets. The remainder, thirteen 28 cm and five pieces, plus additional motorised batteries comprising twelve 24 cm guns and ten 21 cm weapons, could be fired at shipping but were of limited effectiveness due to their slow traverse speed, long loading time and ammunition types.