Fabricates and repairs sail-cloth.
analyses sail requirements for type, size and usage of boats
calculates sail dimensions using sail-calculation tables
computes dimensional allowances for hemming and stretching of sail-cloth and for draft and roach of sails
draws full size patterns of sails on floors
spreads sail-cloth over floor patterns, marks pattern outlines on cloth and cuts into parts for assembly
supervises or performs sewing of cloth to make sails