By 1911 about 193 guns of this type were in service, and they became standard equipment in the Royal Navy until 1915.
 In that year, service during the First World War proved these weapons to be ineffective and they were quickly removed from most of the larger ships, some were mounted in armoured lorries as the main armaments of the Pierce-Arrow and Seabrook armoured lorries.
 During the interwar years they were widely used to arm light ships and river craft.
 A number of them were converted into anti-aircraft guns and by 1927 at least 62 guns had been converted.
By 1911 about 193 guns of this type were in service, and they became standard equipment in the Royal Navy until 1915.  In that year, service during the First World War proved these weapons to be ineffective and they were quickly removed from most of the larger ships, some were mounted in armoured lorries as the main armaments of the Pierce-Arrow and Seabrook armoured lorries.  During the interwar years they were widely used to arm light ships and river craft.  A number of them were converted into anti-aircraft guns and by 1927 at least 62 guns had been converted.
QF 3-pounder Vickers