Supermarine Walrus, Sea Otter, Seamew and Seagull

The Supermarine Seagull was a biplane amphibian, originally designed to operate as a spotter for naval gunfire at the start of the 1920s. It was then almost completely redesigned for the RAAF in 1933 as the Seagull V, and this version of the aircraft entered British service as the Supermarine Walrus.
The Supermarine Seamew was a biplane amphibian designed to satisfy Air Ministry specification 29/24, but which had a low priority at Supermarine and never entered service.
The Supermarine Sea Otter was designed as the replacement for the Walrus, but although the first aircraft made its maiden flight in September 1938 Supermarine was busy with the far more important Spitfire programme, and only a small number of Sea Otters saw active service late in the Second World War
The Supermarine Walrus was one of the unsung workhorses of the Fleet Air Arm and RAF during the Second World War, operating as a fleet spotter and air sea rescue aircraft and fighting in just about every theatre of the war.