The SEA IV was a French two-seat military aircraft of World War I and the immediate post-war era.

It was a derivative of their previous SEA II design, equipped with a more powerful Lorraine engine of 261 kW (350 hp).

It was initially tested by Gustave Douchy, a flying ace of 9 victories, then by the pilots of the Centre d'essais en Vol at Villacoublay.

In October, General Headquarters ordered the commissioning of a flotilla to operate these aircraft, and therefore required production to reach 200 planes per month during the first quarter of 1919, to have a force of 400 on hand by April 1.

[1] Data from French aircraft of the First World War,[1] Aviafrance:SEA IV[2]General characteristics Performance Armament