4.11.1 Efficient guardrails or bulwarks shall
be fitted on all exposed parts of decks to which crew or passengers
have access. Alternative arrangements such as safety harnesses and
jack-stays may be accepted if they provide an equivalent level of
safety. The height of the bulwarks or guardrails shall be at least
1 m from the deck, provided that, where this height would interfere
with the normal operation of the craft, a lesser height may be approved.
4.11.2 The opening below the lowest course of
the guardrails shall not exceed 230 mm. The other courses shall be
not more than 380 mm apart. In the case of craft with rounded gunwales,
the guardrail supports shall be placed on the flat of the deck.
4.11.3 Satisfactory means (in the form of guardrails,
lifelines, gangways or under-deck passages, etc.) shall be provided
for the protection of the crew in getting to and from their quarters,
the machinery space and all other parts used in the necessary work
of the craft.
4.11.4 Deck cargo carried on any craft shall be
so stowed that any opening which is in way of the cargo and which
gives access to and from the crew's quarters, the machinery space
and all other parts used in the necessary work of the craft, can be
properly closed and secured against the admission of water. Effective
protection for the crew in the form of guardrails or lifelines shall
be provided above the deck cargo if there is no convenient passage
on or below the deck of the craft.