In 1943 Z Force Commando Sam Carey and his unit conducted a mock raid on Townsville harbour at night. Dummy limpet mines were placed on shipping as part of a secretive training exercise. This was essentially a practice for a raid on Japanese held at Rabaul that did not eventuate. Unfortunately for Carey, the authorities were not informed and a ship that had been unloading had risen higher in the water revealing the mines. Other ships were checked and every ship in the port, including those outside were found to be mined in what was a glaring security breach. Carey...