The Marine Aircraft Experimental Establishment (MAEE) was a British military research and test organisation. It was originally formed as the Marine Aircraft Experimental Station in October 1918 at RAF Isle of Grain, a former Royal Naval Air Service seaplane base, to design, test and evaluate seaplanes, flying boats and other aircraft with a naval connection.
It was renamed as the Marine and Armament Experimental Establishment on 16 March 1920 to recognise that weapons and other equipment were evaluated as well as complete aircraft. It was renamed again on 1 March 1924 as the Marine Aircraft Experimental Establishment.