| Term | History |
|---|
| 1 | Became a Engineer/Gunner at age 18 |
| 1 | Is now a Crewman |
| 1 | Special assignment or duty on board ship. |
| 1 | Promoted to Engineer/Gunner rank 1 |
| 1 | Is now a Able Spacehand |
| 2 | Continued as Engineer/Gunner at age 22 |
| 2 | Vessel participates in a diplomatic mission. |
| 2 | Gain a contact. |
| 2 | Attempt at commissioned failed. |
| 2 | Promoted to Engineer/Gunner rank 2 |
| 2 | Is now a Petty Officer, 3rd class |
| 3 | Continued as Engineer/Gunner at age 26 |
| 3 | Placed in the frozen watch (cryogenically stored on board ship) and revived improperly. |
| 4 | Became a Scientist at age 30 |
| 4 | Good fortune |
| 4 | Promoted to rank 1 |
| 5 | Continued as Scientist at age 34 |
| 5 | Win a prestigious prize for your work. |
| 6 | Continued as Scientist at age 38 |
| 6 | Entangled in a bureaucratic or legal morass that distracts you from your work. |
| 6 | Promoted to rank 2 |
| 7 | Continued as Scientist at age 42 |
| 7 | Moved to a new world. |
| 7 | Promoted to rank 3 |
| 8 | Continued as Scientist at age 46 |
| 8 | Assigned to work on a secret project for a patron or organisation. |
| 8 | Forced to muster out. |
| 9 | Returned to Engineer/Gunner at age 50 |
| 9 | Commanding officer takes an interest in your career. |
| 9 | Attempt at commissioned failed. |
| 9 | Promoted to Engineer/Gunner rank 3 |
| 9 | Is now a Petty Officer, 2nd class |
| 10 | Continued as Engineer/Gunner at age 54 |
| 10 | Moved to a new world. |
| 10 | Promoted to Engineer/Gunner rank 4 |
| 10 | Is now a Petty Officer, 1st class |
| 11 | Continued as Engineer/Gunner at age 58 |
| 11 | Advanced training in a specialist field |
| 11 | Promoted to Engineer/Gunner rank 5 |
| 11 | Is now a Chief Petty Officer |
| 12 | Continued as Engineer/Gunner at age 62 |
| 12 | Commanding officer takes an interest in your career. |
| 12 | Attempt at commissioned failed. |
| 12 | Promoted to Engineer/Gunner rank 6 |
| 12 | Is now a Master Chief |
| 12 | Forced to muster out. |