Special rules are laid down for the opening and closing of all doors, hatches, valves and other watertight openings situated near or below the waterline.
Imigaqe eyedina ibekelwe ukuvulwa nokuvalwa kwayo yonke iminyengo, izivalo, ivalvu nazinye indawo ezivulekayo ezingangeni manzi ezibekwe kufutshane okanye nguphantsi komgcu wamanzi.