CASR
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In Detail |
Coastal Patrol, Offshore Patrol, and Maritime Defence – September 2004 
The Small End: EEZ Patrol DownunderThe Royal Australian Navy’s Fremantle- class are responsible for patrolling both Australia’s coastlines and its Economic Exclusion Zone (EEZ). By any definition ( including RAN’s ) the 41m Fremantles would be considered ‘patrol boats’, not Offshore Patrol Vessels despite being tasked with securing Australia’s EEZ. 
RAN shares coastal patrol duties with the Australian Customs’ National Marine Unit (see:
the Australian Approach to Maritime Security). The NMU is part
of Coastwatch and maintains a fleet of eight unarmed Bay
class patrol boats. The Bay class was the basis for one of three proposals to replace the aging
Fremantle-class patrol boats.
Simplified Bay-class boats had also been developed (right, note short forward superstructure) for export
with light armament added but, further changes were required for the design to suit naval offshore patrol.
Replacing the Fremantle-class did receive a great deal of international attention. This was primarily due
to each competing design employing different construction materials. The ADI submission followed the
Italian glassfibre approach. Tenix favoured conventional welded steel. But, the winning submission was the
Austal design based on that firm’s welded- aluminum Bay-class customs boat.RAN’s new Armidale-class boats – the first of which is due for delivery in 2005 – 
are dramatically different compared to the Bays, being stretched to 57m and armed with a
remote-controlled, 25mm gun. The Armidale-class are intended for extremes including
the rougher waters south of Tasmania. But, not being ice-resistant (a DND obsession) and being even
smaller than the CF Kingston-class MCDV, the other- wise fine
Armidales will most likely be out of the running for any Canadian OPV.Nevertheless, there are lessons to be gleaned from the Fremantle replacement: • Begin the replacement project before the original vessels are completely worn out. (The Fremantle-class due to be replaced were only delivered in the 1980s.) • Support shipbuilding as a strategic industry. The RAN was able to exploit the growth potential of the Bay class and its welded aluminum construction because Australian shipbuilders had been encouraged to develop innovative techniques. |