For all Orienteering Series Tasmania events all competitors must carry a whistle. At the OST5 event at Campania on 20 June we will have some available at registration. At the start you will be be required to show your whistle to the starter. If you wish to purchase one beforehand, most bushwalking shops sell them for a few dollars. The whistles are for use ONLY in an emergency. If injured or seriously lost - 6 short whistle blasts, pause, listen, then repeat.