HMS M33 - Batlle Ship, Portsmouth

HMS M33 is an M29-class monitor of the Royal Navy. She saw active service in the Mediterranean during World War I and in Russia during the Allied Intervention in 1919. She was used subsequently as a mine-laying training ship, fuelling hulk, boom defence workshop and floating office, being renamed HMS Minerva and Hulk C23 during her long life. She passed to Hampshire County Council in the 1980s and as one of only two surviving Royal Navy World War I ships, was restored to original condition and is now located at Portsmouth Historic Dockyard.

M33 was built as part of the rapid ship construction campaign following the outbreak of World War I. Ordered in March 1915, she was launched in May and commissioned in June; an impressive shipbuilding feat especially considering that numerous other ships of her type were being built in the same period.

Armed with a pair of 6-inch (152 mm) guns and having a shallow draught, M33 was designed for coastal bombardment. Commanded by Lieutenant Commander Preston-Thomas, her first active operation was the support of the British landings at Suvla during the Battle of Gallipoli in August 1915. She remained stationed at Gallipoli until the evacuation in January, 1916. For the remainder of the war she served in the Mediterranean and was involved in the seizure of the Greek fleet at Salamis Bay on 1 September 1916.