Statutory Documents - MCA Publications - LY3 - The Large Commercial Yacht Code - 6 Water Freeing Arrangements - 6.3 Recesses
6.3 Recesses
6.3.1 Any recess in the weather deck should be of weathertight construction and should be self draining under all normal conditions of heel and trim of the vessel.
A swimming pool or spa bath, open to the elements, should be treated as a recess.
6.3.2 The means of drainage provided should be capable of efficient operation when the vessel is heeled to an angle of 10° in the case of a motor vessel (see 10A.2), and 30° in the case of a sailing vessel.
The drainage arrangements should have the capability of draining the recess (when fully charged with water) within 3 minutes when the vessel is upright and at the load line draught. Means should be provided to prevent the backflow of sea water into the recess.
6.3.3 When it is not practical to provide drainage which meets the requirements of 6.3.2, alternative safety measures may be proposed for approval by the Administration. Where the above requirements for quick drainage cannot be met, the effect on intact and damage stability should be considered taking into account the mass of water and its free surface effect.
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