| Term |
Age |
History |
|---|
| 1 |
18 |
Became a Navy (Engineer/Gunner) with the new title Crewman. |
| 1 |
20 |
Special assignment or duty on board ship. |
| 1 |
22 |
Promoted to Navy (Engineer/Gunner) rank 1 with the new title Able Spacehand. |
| 2 |
22 |
Continued as Navy (Engineer/Gunner). |
| 2 |
25 |
Advanced training in a specialist field. |
| 2 |
26 |
Promoted to Navy (Engineer/Gunner) rank 2 with the new title Petty Officer, 3rd class. |
| 3 |
26 |
Voluntarily left Engineer/Gunner |
| 3 |
26 |
Became a Drifter (Wanderer). |
| 3 |
29 |
Suffer from a life-threatening illness. |
| 4 |
30 |
Continued as Drifter (Wanderer). |
| 4 |
31 |
Find Ancient Technology. |
| 4 |
34 |
Forced to muster out. |