First of all, it's not a jury trial. The function of the members of a panel in a court martial is not to find facts like a jury does. It has a different role from a civilian jury. It may seem pedantic on my part, but it's critical to conceiving the way in which a court martial is meant to work. It's one of the challenges, too, by the way of comparing our system with the system as it operates in Great Britain or Australia. We may use the same titles, but they can mean different things. That's the first thing I'd say.
I'm not sure our system of civil juries in Canada today is particularly covered in glory. There's that old joke that the people who determine your guilt or innocence are the people who are too stupid to be able to evade jury service themselves.