Tank Academy
At the cost of 200 gold, this option retrains a crew member to the same level as he was before, but for the new vehicle.
Regimental School
At the cost of 20,000 credits, this option retrains a crew member to 75%. If a crew member's primary specialization is below 75%, then his primary specialization after retraining is automatically 75%. If the crew member is above 75% in primary specialization, then after retraining it will be as follows:
If the crew member is retraining to a vehicle of the same class, then the final experience is 90% of the crew member's current experience level.
If the crew member is retraining to a vehicle of a different class, then the final experience is 80% of the crew member's current experience level.
Rapid Courses
This option is free, and retrains a crew member to 50% in primary specialization, which is the absolute minimum that a crew member can be. The final primary specialization level after retraining through rapid courses is as follows:
If the crew member is retraining to a vehicle of the same class, then the final experience is 80% of the crew member's current experience level.
If the crew member is retraining to a vehicle of a different class, then the final experience is 60% of the crew member's current experience level.