Mark-1
Well-Known Member
It seems certain to me that "restricted visibility" must refer to something that is outwith the eye of the observer and which is beyond the control of the observer and therefore impossible for the observer to ameliorate.
I think that there is little doubt that at the time of the collision, the visibility ahead from the bridge of the ferry was restricted.
As it happens I suspect Rule 19 wouldn't apply here, but I can find nothing in the rules or elsewhere that confirms that, so we'll have to wait either for a court to decide or for the IRPCS to flesh out their definition a bit.
Thanks to Thistle and UJ for kicking off an interesting digression.