World War I: an operating theatre in a hospital ship. Oil painting by Godfrey Jervis Gordon ("Jan Gordon").

Possibly Battle of Jutland, May 1916. The artist was commissioned to paint the sailors wounded in that battle, on HMS Castor, and a finished painting by him of that ship is in the Imperial War Museum. This is an oil-sketch of a different scene apparently produced in the same campaign. However, the artist may have been on other ships as well