Even if you go to the options and unbind every instance of the arrow keys, pressing an arrow key will still give movement orders to the driver when as a vehicle commander. This might clash with people's specific control schemes and seems weird overall that there is no way to actually unbind vehicle movement orders from the arrowkeys.
I like to use the arrowkeys to turn vehicle turrets, because it's faster and easier than rotating the turret with your mouse due to the capped rotation speed.
There's still no way to bind the key for the direction order... Sad. (I have the problem for W, A, S, D on my QWERTZ keybord)
You can disable it from .cfg file. Not sure is it these:
keyCommandLeft[]={30};
keyCommandRight[]={32};
keyCommandForward[]={17};
keyCommandBack[]={31};
keyCommandFast[]={18};
keyCommandSlow[]={16};
My command keys look like that and arrows don't issue commands. Just take the arrow keys out like I've done.
C:\Users\USER_NAME\Documents\Arma 3
Also here are some tickets
http://feedback.arma3.com/view.php?id=13325
http://feedback.arma3.com/view.php?id=10736
The second one shows you the same method as I said.
Yea, by the way, here's the ticket I posted some weeks ago! http://feedback.arma3.com/view.php?id=11745