1. Adequate measures shall be taken to protect
any opening in or on a deck where workers are required to work, through
which opening workers or vehicles are liable to fall.
2. Every hatchway not fitted with a coaming of
adequate height and strength shall be closed or its guard replaced
when the hatchway is no longer in use, except during short interruptions
of work, and a responsible person shall be charged with ensuring that
these measures are carried out.