| Term |
Age |
History |
|---|
| 1 |
18 |
Failed to qualify for Army Support (Army). |
| 1 |
18 |
Submitted to the draft. |
| 1 |
18 |
Became a Navy (Engineer/Gunner) with the new title Crewman. |
| 1 |
19 |
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 |
Display heroism in battle, saving the whole ship. |
| 2 |
26 |
Commissioned in Navy (Engineer/Gunner) with the new title Ensign. |
| 2 |
26 |
Promoted to Navy (Engineer/Gunner) officer rank 2 with the new title Sublieutenant. |
| 3 |
26 |
Continued as Navy (Engineer/Gunner). |
| 3 |
28 |
Advanced training in a specialist field. |
| 3 |
30 |
Promoted to Navy (Engineer/Gunner) officer rank 3 with the new title Lieutenant. |