Last summer when sailing along the South Coast, we were heading towards a marker buoy. As we got closer it became more clear that we were likely to hit it. We were sailing on a narrow to beam reach at the time, and the Steersman was steering the boat.
In order to avoid the buoy, we just tensioned up on the shock cord by about a centimetre and the boat steered a few degrees down wind. Once we were past, we re-set the shock cord and she came back on course. Very satisfying to have such easy steering without touching the helm.