Statutory Documents - MCA Publications - LY3 - The Large Commercial Yacht Code - 5 Weathertight Integrity - 5.2 Doorways and Companionways - 5.2.2 Companion hatch openings
5.2.2 Companion hatch openings
5.2.2.1 Companionway hatch openings which give access to spaces below the weather deck should be fitted with a coaming, the top of which is at least 300mm above the deck, or 150mm in the case of Short Range Yachts.
5.2.2.2 Washboards may be used to close the vertical opening. When washboards are used, they should be so arranged and fitted that they will not be dislodged readily. Whilst stowed, provisions are to be made to ensure that they are retained in a secure location.
5.2.2.3 The maximum breadth of an opening in a companion hatch should not exceed 1 metre.
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