Well, it won't be a sphere since it'll presumably have an arc so it can't shoot through the ship.
Yeah but seeing as most ships have all round coverage and it wouldn't take long to kill each fighter it is basically a battle sphere.
But if the beam is invisible how can the player tell they are being shot through the hull
Well technically yeah but how many people are gonna play around with the turrets if all they need to do is load up and invisible beam animation and change the timings???
Although it would still make the beam sound so it would be somewhat ... odd.