| S.20 Mercury | |
|---|---|
 Image from a contemporary newspaper article, depicting Mercury atop Maia | |
| General information | |
| Type | Transport seaplane carried to flight altitude by Short S.21 Maia |
| National origin | United Kingdom |
| Manufacturer | Short Brothers |
| Designer |
|
| Primary users | Imperial Airways |
| Number built | 1 |
| History | |
| Introduction date | 14 July 1938 |
| First flight | 5 September 1937 |
| Retired | 1941 |
| S.21 Maia | |
|---|---|
| General information | |
| Type | Flying-boat, launch aircraft for S.20 Mercury |
| National origin | United Kingdom |
| Manufacturer | Short Brothers |
| Designer | Arthur Gouge Robert H. Mayo |
| Status | destroyed by enemy bombing 11 May 1941 |
| Primary user | Imperial Airways |
| Number built | 1 |
| History | |
| Introduction date | 14 July 1938 |
| First flight | 27 July 1937 |
The Short Mayo Composite was a piggy-back long-range seaplane and flying boat combination produced by Short Brothers to provide a reliable long-range air transport service to North America and, potentially, to other distant places in the British Empire and the Commonwealth.