In SH3 commander you can award sailors qualifications but as I understand it these qualifications only make a difference if awarded to petty officers and officers.
I keep 5 officers. The officers that occupy the stern and bow quarters will be watch - torpedo - repair qualified. This comes in handy for simultaneous bow and stern reloads. It also substantially reduces repair time to have a repair qualified officer on the damage control team.
I have found that six or seven regular sailors with one repair qualified officer gives me an almost full green bar on the damage control team.
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