Two ships and two establishments of the

Royal Navy The Royal Navy (RN) is the United Kingdom's naval warfare force. Although warships were used by English and Scottish kings from the early medieval period, the first major maritime engagements were fought in the Hundred Years' War against ...

have been named HMS ''Impregnable'':

Ships

* was a 98-gun

second rate In the rating system of the Royal Navy used to categorise sailing warships, a second-rate was a ship of the line which by the start of the 18th century mounted 90 to 98 guns on three gun decks; earlier 17th-century second rates had fewer guns ...

. This ship of the line was launched in 1786 and wrecked in 1799. * was a 98-gun second rate launched in 1810. She became a

school ship A training ship is a ship used to train students as sailors. The term is mostly used to describe ships employed by navies to train future officers. Essentially there are two types: those used for training at sea and old hulks used to house class ...

in 1862, was renamed HMS ''Kent'' in 1888, HMS ''Caledonia'' in 1891, and was sold in 1906.

Training establishment

* was a training establishment started at Devonport in 1862, and active until 1929. As training ships were replaced or added to the establishment, each was renamed ''Impregnable'' when she took on the role: ** was the original school ship between 1862 and 1888. ** was HMS ''Impregnable'' between 1885 and 1911, and HMS ''Impregnable I'' between 1911 and 1919. ** was HMS ''Impregnable'' between 1919 and 1929. ** was HMS ''Impregnable II'' between 1911 and 1919, and HMS ''Impregnable (Old)'' between 1919 and 1922. ** was HMS ''Impregnable II'' between 1919 and 1931. ** was HMS ''Impregnable III'' between 1910 and 1922. ** was HMS ''Impregnable III'' between 1922 and 1929. ** was HMS ''Impregnable IV'' between 1915 and 1922. ** was HMS ''Impregnable IV'' between 1919 and 1929. * was a training establishment for 'hostilities only' communications ratings at Plymouth between 1935 and 1947. After decommissioning HMS ''Impregnable'' was reopened soon after, remaining in commission until 1948.

References

* {{DEFAULTSORT:Impregnable, Hms Royal Navy ship names