Sail trimmer
The crew member controlling sheets and sail shape.
How to sign
Use Dominant R-hand: sheet rope classifier. The base or passive hand is Person locus beside boat; sail and sheet loci established. Set sail and sheet. Place a person locus beside the boat. At that person locus, repeat short PULL-IN and LET-OUT movements on the sheet. End with the person associated with sheet control and sail trim. Establish the sail and sheet. Use a person locus beside the boat, then repeat the directional PULL-IN and LET-OUT movements at that locus.