HMS Impregnable was a British Royal Navy ship launched in 1786. Originally designed as a 98-gun second-rate ship of the line, she was eventually converted into a training ship for boys in 1862. The ship underwent several modifications throughout her career, including being reduced to 104 guns in 1795 and then to 98 guns in 1820. HMS Impregnable saw limited action in the French Revolutionary and Napoleonic Wars, participating in the Battle of Cape St Vincent in 1797. Her most significant role came as a training ship, where she served as a floating naval school for boys in Plymouth. In 1869, she was moved to Portland and later to Devonport, where she continued her training duties until 1927. The ship was eventually sold for scrap in 1928. HMS Impregnable's long service as a training vessel highlights the importance of naval education and the evolution of ships from active combat roles to instructional purposes over time.

This description has been generated using GPT-3.5-TURBO based on the Vessel's wikidata information and then modified by ShipIndex.org staff.