20.1 The surface of a working deck shall be non-slip.
Acceptable surfaces are: chequered plate; unpainted wood; a non-skid
pattern moulded into fibre reinforced plastic (FRP); non-slip deck
paint; or an efficient non-slip covering.
20.2 A hatch cover fitted on a working deck shall
have a non-slip finish.
20.3 In an inflatable boat or rigid inflatable
boat the upper surface of the inflated buoyancy tube shall be provided
with a non-slip finish.