| Year | 1981 |
| Date | 03-Apr |
| Volume | 147 |
| Issue | 3,654 |
| Page | 412 |
| Category | Nautical |
| Part | |
| Title | Early Battery Powered Boats and Ships |
| Author | David Garley |
| Notes | Immisch electric launch, steering and control lever by Thames Valley Launch Company, general layout of a Holland type submarine |