The powers vendor is not abilities that you train, thats on your own character sheet. Hit 'U' select your character, select status and look at the bottom, you will see a tab marked 'Train" select the ability to train and then the officer to train it too and there ya go.
Hi- I have a two part related question- Once you train a BO in HYIII can you train other tactical BO's in it as well? Or can you only TRAIN a BO in that Skill 1 time?
Another question is what happens if I train HYIII to a BO that has HYI as his ensign level skill then put him in a tactical LC Post- Does that mean he gets BOTH HYI and HYIII in his available powers buttons?! How does that work?