| Year | 1986 |
| Date | 21-Feb |
| Volume | 156 |
| Issue | 3,771 |
| Page | 212 |
| Category | Nautical |
| Part | 7 |
| Title | A Marine Triple Expansion Engine. The O.B.Bolton design |
| Author | J.P.Bertinat |
| Notes | Machining the standards on the lathe, guide bars, weighshaft bearings, reversing wheel bearings & reversing crank bearing |