Regulation 7 Other lookout arrangements
The requirements of regulations 4 and 6 do not apply to a ship which is operated with bridge manning levels which include a helmsman and an officer of the watch, if –
(a)
the helmsman is able to see the water surface at no more than two ship's lengths ahead and has an unobstructed view to 60 degrees on either bow, and
(b)
the officer of the watch is able to obtain all round visibility by horizontal movement within the navigation work area.