DejaVu,
The #3 is posted for the sake of stealth operations.
Suppose you are a TG commander, and you take the blow of helming it to some distant enemy harbor. You would have to be virtually present at the "helm".
Now imagine that some 2/3 sectors away of the destination port, some crazy zeke driver just pop up in the middle of nowhere and climbs.
Sector counters in the middle of the sea easily unveil the operation in the enemy's eyes.
Given that higher ranks override TG command, I doubt

any of the high rank guys online won't take any measure if some dweeb just close TG deck for the fun of it.
Anyway, only when LST's are implemented stealth TG operations could have any impact.
Cheers,
Pepe