become entangled yourself. If you are quick you may manage to climb directly onto the centreboard. A windward capsize will be very wet. Your priority once capsized will be to unhook yourself quickly and move to the back of the boat, clear of the sails etc., as the boat settles on its side.
Communication is crucial with the crew on the trapeze. Warn the crew before altering course and discuss how to share responsibilities; e.g. when under spinnaker, crew concentrates on trimming spinnaker and helm watches for gusts and traffic.