How far is it from the parked position offshore to the Rotation point on a Night Offshore Takeoff with no visible surface reference other than the Deck and Rig?
Memory serves me the purely vertical ascent ends where the Rotation begins and usually is at the Deck Edge so there is not much Visibility required on that long transit from the Parking location to the Deck Edge unless the high price of Petrol I have had to pay has facilitated much larger decks offshore these days.