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Ethnology of Manihiki and Rakahanga
Figure 62. Double canoe, gunwale plank: a, right outer side; b, right inner side; c, cross-section. 1, lower convex edge; 2, upper concave edge; 3, aft end to fit against stern piece; 4, fore end to fit against bow piece; 5, internal flange, holes drilled vertically through base of flange at intervals to correspond with holes bored horizontally through hull a little below upper edge; 6, space below flange, rests against outer side of hull; 7, lower edge, rounded on outside
Figure 62. Double canoe, gunwale plank: a, right outer side; b, right inner side; c, cross-section. 1, lower convex edge; 2, upper concave edge; 3, aft end to fit against stern piece; 4, fore end to fit against bow piece; 5, internal flange, holes drilled vertically through base of flange at intervals to correspond with holes bored horizontally through hull a little below upper edge; 6, space below flange, rests against outer side of hull; 7, lower edge, rounded on outside.