sunderfire

Zilfin command trait says "A Barak-Zilfin general that is an arkanaut admiral must have this command trait~". Does it mean I should select admiral as a general in my army? If i select another hero in my army, can i select another trait?

But garrison part of core rule says like this: "Units that garrison a terrain feature are removed from the battlefield and are assumed to be ‘inside’ the terrain feature. Units must treat a terrain feature garrisoned by the enemy as if it were an enemy model." Core rule says "removed from the battlefield". What do you think of that?

I have some questions. 1. Barak-zilfin command trait says 'general(must admiral) on the battlefield'. but admiral's command ability on warscroll only can be used in garrison except charge re-roll. So, if my admiral is garrison, command trait is useless. isn't it? 2. Troops in garrison still can shooting, even if skyvessel ran? Thanks.