Ordinary seaman Jackson becomes a D.E.M.S seaman gunner. After a four months' course at a naval training establishment, ordinary seaman Jackson became a seaman gunner on board a merchant ship, a member of the Navy's Defensively Equipped Merchant Ships Service. D.E.M.S gunners and gunners of the Maritime Regiments, soldiers who now serve beside them, have destroyed or damaged 228 enemy aircraft since the beginning of the war. Equipped with a great variety of new weapons and anti-aircraft devices, the D.E.M.S Service has grown from a nucleus of 1,300 men to nearly 20,000 trained seamen gunners and gunslayers. Soldiers originally recruited from the Army as a temporary augmentation, later took the name Maritime Regiments, thus reviving and carrying on the 17th century regiment of that name. Jackson, now a D.E.M.S seaman gunner arrives to join his first ship