| Term |
Age |
History |
|---|
| 1 |
18 |
Became a Scholar (Physician). |
| 1 |
21 |
Work leads to a considerable breakthrough. |
| 1 |
22 |
Promoted to Scholar (Physician) rank 1. |
| 2 |
22 |
Continued as Scholar (Physician). |
| 2 |
24 |
Refused to perform research that goes against Duane Nguyen's conscience. |
| 3 |
26 |
Voluntarily left Physician |
| 3 |
26 |
Became a Navy (Engineer/Gunner) with the new title Crewman. |
| 3 |
27 |
Vessel participates in a notable military engagement. |
| 4 |
30 |
Continued as Navy (Engineer/Gunner). |
| 4 |
32 |
Advanced training in a specialist field. |
| 4 |
34 |
Promoted to Navy (Engineer/Gunner) rank 1 with the new title Able Spacehand. |