In the case where the trunk height is less than standard
and the trunk hatch coamings are also of less than standard height,
or omitted entirely, doubt may arise whether the trunk hatchways are
located in position 1 or position 2 and, consequently, about the reduction
to be made in the actual trunk height. In these cases the reduction
from the actual height of trunk on account of insufficient hatch coaming
height should be taken as the difference between 600 mm and the actual
height of coaming, or 600 mm if no hatch coamings are fitted. Reduction
in the actual height of trunk should not be required in cases where
only small hatches with less than standard height are fitted in the
trunk deck for which dispensation from the requirement of standard
coaming height may be given.