HMS Cossack was a Banterer-class post ship of the Royal Navy, launched in 1806 at South Shields, England. Originally ordered in January 1805 as HMS Pandour, she was launched under that name but was renamed Cossack later in 1806. The vessel was designed with a nominal 22 guns, intended to be mounted as long 9-pounder guns on her main deck. Her armament was later modified during her service to include two brass howitzers and 32-pounder carronades, replacing her original 9-pounders, and she also carried eight 24-pounder carronades and two long 6-pounders on her quarterdeck and forecastle. Her complement increased to 175 officers, men, and boys. Cossack was an active participant in the Napoleonic Wars, notably serving at the Battle of Copenhagen in 1807 and sharing in the prize money from the capture of the Danish fleet. She also contributed to the capture of the French brig Pierre Caesar in June 1808, which was subsequently commissioned into the Royal Navy as Tigress. Additionally, she captured the schooner Mouche in August 1808 and the French sloop Celestene in March 1809, the latter having thrown 16 guns overboard during the chase. Throughout her service, Cossack participated in various operations, including efforts to assist Spanish loyalists near St. Andero in June 1808, where her boats spiked guns and destroyed magazines at Fort St Salvador de Ano and Fort Sedra. She served on multiple stations, including the Portugal and North America stations, under various commanders, and was involved in convoy escort duties and storm damage repairs. Her operational history includes capturing vessels, assisting in salvage operations, and participating in military and blockade activities until her decommissioning. HMS Cossack was broken up at Portsmouth in June 1816, marking the end of her nearly decade-long service in the Royal Navy.

This description has been generated using GPT-4.1-NANO based on the Vessel's wikidata information and then modified by ShipIndex.org staff.