HMS M1, British Royal Navy submarine wreck in English Channel, United Kingdom.
HMS M1 is a British Royal Navy submarine that lies on the seabed near the English coast. The vessel carried a large gun mounted on its deck, a feature that distinguished it from conventional submarines of the period.
The submarine entered service in 1917 as part of Britain's naval development program during the post-war period. It sank in 1925 after a collision with a Swedish cargo vessel during operations in the English Channel.
The vessel represents an early attempt by the Royal Navy to merge surface warfare tactics with submarine technology in one platform. Visitors can observe how naval engineers of the era experimented with underwater combat methods that broke from conventional submarine design.
This wreck sits deep on the seabed and requires special diving equipment and official authorization to visit. Interested visitors should contact the relevant maritime authorities, as the site is legally protected as a military memorial.
The gun was engineered so that only the barrel protruded above the waterline when the submarine was submerged. This allowed the vessel to engage surface targets while remaining hidden beneath the waves.
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