Statutory Documents - MCA Publications - LY3 - The Large Commercial Yacht Code - 5 Weathertight Integrity - 5.4 Portlights
5.4 Portlights
5.4.1 Portlights should be of strength appropriate to location in the vessel and meet an appropriate national or international standard. Recognised Classification Society rules for "ships" are considered to meet these requirements. Where a recognised Classification Society produces alternative rules for "pleasure vessels" or "yachts", these are considered appropriate for Short Range Yachts. With regard to structural fire protection, the requirements for the construction of certain portlights should meet the requirements of Section 14A and 14B.
5.4.2 In general, all portlights fitted in locations protecting openings to spaces below the weather deck or fitted in the hull of the vessel should be provided with a permanently attached deadlight which is to be capable of securing the opening watertight in the event of a breakage of the portlight glazing. Proposals to fit portable deadlights will be subject to special consideration and approval by the Administration, having regard for the location of the portlights and the ready availability of deadlights. Consideration should be given to the provision of operational instructions to the Master as to when deadlights must be applied to portlights.
5.4.3 Portlights fitted in the hull of the vessel below the level of the freeboard deck should be either non-opening or of a non-readily openable type and be in accordance with a standard recognised by the Administration. The lower edge of the portlights should be at least 500mm or 2.5% of the breadth of the vessel, whichever is the greater, above the all-seasons load line assigned to the vessel. Portlights of the non-readily opening type must be secured closed when the vessel is in navigation and indication provided on the bridge that they are closed.
5.4.4 Proposals to fit large portlights (i.e. greater than 0.16 M2) in the main hull below the level of the freeboard deck will be subject to special consideration and approval by the Administration, having regard for their location and strength and their supporting structure and, the availability of strong protective covers for them. One item of the special consideration should be operational instructions to the Master as to when the strong protective covers must be fitted.
5.4.5 Portlights should not be fitted in the hull in the way of the machinery space.
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