25.3.1 When a vessel is engaged in carrying cargo
all such cargo should be stowed and secured in a manner which will
not adversely affect the safe operation of the vessel.
25.3.2 Particular attention should be paid to
the means for securing the cargo and the strength of securing points,
the free drainage of water from cargo stowed on open deck, safe access
in way of cargo stows and unobstructed visibility from the wheelhouse.
25.3.3 Cargo hatchways to dry cargo holds or spaces
should be of an efficient weathertight construction.
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25.3.3.1 In general, a cargo hatch coaming should
be not less than 760mm in height. Hatch covers and coamings should
be designed to withstand (without permanent deformation) a hydrostatic
load of not less than 1.5 tonnes/metre2 overall and associated
buckling stress, and be fitted with efficient means to be closed and
secured weathertight to the coaming. In any case, the coaming and
hatch cover should be sufficiently strong to withstand the hydrostatic
loading and/or the loading due to cargo stowed on the hatch cover,
whichever loading is limiting.
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25.3.3.2 Proposals for a cargo hatchway with a
reduced coaming height or a flush hatch should be subject to special
consideration by the Certifying Authority and may be approved when
the safety of the vessel is judged to be at least equivalent to Section
25.3.3.1.