| Company | Timeline | Status | |
| Highseas Authors Limited Director • Author | 16 Oct 1992←33 Years→Current | Active | |
| Bolitho Maritime Productions Limited Director • Author | 16 Oct 1992←33 Years→Current | Active | |
| Bolitho Maritime Productions Limited Director • Unreported | 1 Jan 1970←56 Years→Current | Active | |
