HOW AUSTRALIA DEFENDS HER PORTS: By Means of Strong Boom Defences Which Stretch Across Her Harbours
... HOW AUSTRALIA DEFENDS HER PORTS By Means of Strong Boom Defences Which Stretch Across Her Harbours STRIPPED to the waist in tropic heat, men of the Royal Australian Navy work day by day at sea and ashore on the unspec tacular but vital task of operating and maintaining the harbour boom defence system. the basic func tion of boom de fence is to throw out a protecting screen of giant nets ...