Gunboats are a warship used for carrying guns to assist in coastal combat. During the first World War, the Kilmore served as a gunboat for the Royal Navy, and afterward, she was converted into a cargo ship capable of holding 570 tons of cargo at a speed of ten knots. The image at the top left shows the Kilmore in her original form while the image below shows the modifications. During wartime, the Kilmore's stern-shaped bow made it difficult for enemy fleets to tell whether she was coming or going. As a cargo ship, she had a reduced deck with a mast where the false stern use to be. The project was such a hit that a similar conversion was planned for seven other ships in her class.
Read the full story in "A Gunboat in War--A Merchantman in Peace"