1.For the purposes of this Chapter and by way of derogation from Article 1.01 of this Annex, residual freeboard means the smallest vertical distance between the surface of the water and the upper surface of the deck at its edge taking into account trim and heel resulting from the moments referred to in Article 17.07 (4).
2.The residual freeboard is sufficient according to Article 17.07(1), if it is at least 300 mm.
3.The residual freeboard may be reduced if it is proven that the requirements of Article 17.08 have been met.
4.Where the shape of a float differs perceptibly from that of a pontoon, as in the case of a cylindrical float, or where the cross-section of a float has more than four sides, the inspection body may require or authorise a residual freeboard that differs from programme 2. This shall also apply to floating equipment consisting of several floats.