6.1 Where operational needs exist for specified
hatches to be open at sea for lengthy periods, these hatches shall
be:-
-
.1 kept as small as practicable, but never more
than 1mē in plane area at the top of the coaming;
-
.2 located at the centre line of the vessel or
as close thereto as practicable and compatible with the proper working
of the vessel; and
-
.3 fitted such that the access opening is at least
300mm (12 inches) above the top of the adjacent weather deck at the
side of the vessel.
6.2 Spaces fitted with hatches which are open
at sea for lengthy periods shall be provided with means for pumping
out the affected space.