21.1 Rails or equivalent protection shall be installed
near the periphery of all decks of a vessel accessible to passengers
or crew. Equivalent protection may include lifelines, wire rope, chains
and bulwarks that provide strength and support equivalent to fixed
rails. Deck rails shall include a top rail with the minimum height
of 1000mm (39.5 inches) and lower courses or equivalent protection.
The distance between the lowest course and the deck shall not exceed
230mm (9 inches)and the distance between the other courses shall not
exceed 380mm (15 inches).
21.2 In a vessel fitted with a cockpit, which
opens aft to the sea, additional guard rails shall be fitted so that
there is no unprotected vertical opening, i.e. between vertical “members,”
greater than 500mm in width.
21.3 In an inflatable boat or a rigid inflatable
boat, handgrips, toeholds and handrails shall be provided as necessary
to ensure the safety of all persons on board during transit and the
worst weather conditions likely to be encountered in the intended
area of operation.
21.4 Suitable storm rails or hand grabs shall
be installed where necessary in passageways, at deckhouse sides and
at ladders and hatches.
21.5 On a vessel authorised to carry one or more
vehicles, suitable chains, cables or other barriers shall be installed
at the end of each vehicle runway and temporary rails or equivalent
protection shall be installed in way of each vehicle ramp when the
vessel is underway.