This person can double as Grinder.
Crew members take assigned positions.
If known, Helmsman lets the crew know to what point of sail they should trim on the new tack. Discusses with the Grinder whether they have all the turns they need or will be putting more on before they want the winch handle inserted. They place one foot against the toerail and the other in the cockpit. Once all the turns are off, they watch the sheet go through the turning block ensuring it does not foul. Switch to low speed when needed and complete trim of jib.